RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: A store reported total sales of $385 million for February of this year. If the total sales for the same month last year was $320 million, approximately what was the percent increase Q in sales?
A. 2%
B. 17%
C. 20%
D. 65%
Answer: C. 20%
Explanation: Last year's sales = $320 million;
This year's sales = $385 million;
Increase Q = $65 million.
Now, 20% of $320 million is $64 million, which is very close to actual increase of $65 million.
Answer: C.
Question: How many seconds will a train 130 meters long take to cross a bridge 150 meters long if the speed of the train is 36 kmph?
A.28 sec
B.23 sec
C.24 sec
D.25 sec
Answer: A.28 sec
Explanation: D = 130 + 150 = 280
S = 36 * 5/18 = 10 mps
T = 280/10 = 28 sec
A
Question: Truck P and Truck Q drive on the highway in the same direction at respective rates of 72 kph and 80 kph. If Truck Q is 5 km behind Truck P, by how much does Truck P need to increase the speed to catch up with Truck P in 30 minutes?
A.2 kph
B.4 kph
C.6 kph
D.8 kph
Answer: A.2 kph
Explanation: Truck Q needs to gain 5 km in 30 minutes.
The relative speed difference needs to be 5 km / 30 minutes = 10 km/hour
Truck Q needs to increase up to 82 kph, thus an increase in 2 kph.
The answer is A.
Question: Murali travelled from city A to city B at a speed of 40 kmph and from city B to city C at 60 kmph. What is the average speed of Murali from A to C given that the ratio of distances between A to B and B to C is 2 : 3?
A.16
B.50
C.277
D.92
Answer: B.50
Explanation: Let the distances between city A to B and B to C be 2x km and 3x km respectively.
Total time taken to cover from A to C
= (2x)/40 + (3x)/60 = (6x + 6x)/120 = 12x/120 = x/10 Average speed = (2x + 3x)/(x/10) = 50 kmph.
Answer:B
Question: Simple interest on a certain sum is 36 over 25 of the sum. Find the rate per cent and time, if both are equal.
A.8% and 8 years
B.6% and 6 years
C.10% and 10 years
D.12 % and 12 years
Answer: D.12 % and 12 years
Explanation: 36â„25P = PÃ—RÃ—R/100
â‡’ R^2 = 3600â„25 â‡’144=> R = 12%
Also, time = 12 years
Answer D
Question: What is the two-digit number whose first digit is a and the second digit is b?. The number is greater than 9.
The number is multiple of 51.
The sum of the digits a and b is 6.
A.I alone sufficient while II alone not sufficient to answer
B.II alone sufficient while I alone not sufficient to answer
C.Either I or II alone sufficient to answer
D.Both I and II are not sufficient to answer
Answer: A.I alone sufficient while II alone not sufficient to answer
Explanation: From statement I:
A two digit number, greater than 9 and multiple of 51 should be 51 itself.
Because, 2 x 51 = 102 (3 digit number). Therefore, I alone sufficient to answer.
From statement II:
A two digit number, greater than 9 and sum of the digit is 6.
It can be 15, 24, 33, 42, 51. So we cannot determine the required answer from the statement II alone.
Thus, I alone give the answer while II alone not sufficient to answer.
ANSWER A
Question: A certain company had a total annual expenditure of 1.26∗10^7 on employee salaries last year. If the company employed 420 people, what was the average employee salary?
A.$20,000
B.$25,000
C.$35,000
D.$30,000
Answer: D.$30,000
Explanation: Given: Total annual expenditure of 1.26∗10^7 on employee salaries
Total employees = 420
Observe that 420*3 = 1260
Therefore try to bring the numerator in terms of 1260
Average salary = (1260*10^4) /420 = 3*10^4 = 30,000
Option D
Question: A fruit-salad mixture consists of apples, peaches, and grapes in the ratio 9:6:5, respectively, by weight. If 40 pounds of the mixture is prepared, the mixture includes how many more pounds of apples than grapes?
A.15
B.12
C.8
D.6
Answer: C.8
Explanation: We can first set up our ratio using variable multipliers. We are given that a fruit-salad mixture consists of apples, peaches, and grapes, in the ratio of 6:5:2, respectively, by weight. Thus, we can say:
apples : peaches : grapes = 6x : 5x : 2x
We are given that 39 pounds of the mixture is prepared so we can set up the following question and determine a value for x:
9x + 6x + 5x = 40
20x = 40
x = 2
Now we can determine the number of pounds of apples and of grapes.
pounds of grapes = (5)(2) = 10
pounds of apples = (9)(2) = 18
Thus we know that there are 18 – 10 = 8 more pounds of apples than grapes.
Answer is C.
Question: A and B invests Rs.10000 each, A investing for 8 months and B investing for all the 12 months in the year. If the total profit at the end of the year is Rs.25000, find their shares?
A.388898
B.2777
C.2928
D.15000
Answer: D.15000
Explanation: The ratio of their profits A:B = 8:12 = 2:3
Share of A in the total profit = 2/5 * 25000 = Rs.10000 Share of A in the total profit = 3/5 * 25000 = Rs.15000.Answer: D
Question: A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
A.40
B.41
C.45
D.49
Answer: A.40
Explanation: Speed = 45 * 5/18 = 25/2 m/sec
Total distance covered = 360 + 140 = 500 m
Required time = 500 * 2/25 = 40 sec
Answer: Option A
Question: A person purchases 90 clocks and sells 40 clocks at a gain of 10% and 50 clocks at a gain of 20%. If he sold all of them at a uniform profit of 15%, then he would have got Rs. 40 less. The cost price of each clock is?
A.16
B.26
C.80
D.26
Answer: C.80
Explanation: Let C.P. of clock be Rs. x.
Then, C.P. of 90 clocks = Rs. 90x.
[(110% of 40x) + (120% of 50x)] - (115% of 90x) = 40
44x + 60x - 103.5x = 40
0.5x = 40 => x = 80
Answer:C
Question: A Taxi Company marks their tickets 30% more than the real price and allows 30% discount. Company's loss is:
A.6%
B.7%
C.8%
D.9%
Answer: D.9%
Explanation: Let the CP = 100 Rs.
Mark Price = 130
Discount = 30%
Selling price=70/100 Ã— 130
Hence loss = 9%
Answer: D.
Question: We have a rectangular metallic piece of paper that covers exactly the area of a cube. The length of the piece of paper is 144 inches and the width is 72 inches. What is the volume of the cube in cubic feet is 1 feet is 12 inches?
A.a 216
B.b 196
C.c 170
D.d 140
Answer: A.a 216
Explanation: l = 144 /12 = 12 ft
w = 72 / 12 = 6 ft
Area of paper = 72
Area of cube = 12 * side^2
side of cube = 6
V of cube = 216
Question: A man is 24 years older than his son. In two years, his age will be twice the age of his son. What is the present age of his son?
A.23 years
B.22 years
C.21 years
D.20 years
Answer: B.22 years
Explanation: Let present age of the son = x years
Then present age the man = (x + 24) years
Given that in 2 years man's age will be twice the age of his son
x = 22
ANSWER B
Question: A bag contains 12 white and 18 black balls. 2balls are drawn in succession. What is the probability that first is white and second is black?
A.31/115
B.36/145
C.1/214
D.2/213
Answer: B.36/145
Explanation: The probability that first ball is white:
=12C130C1=12C130C1
=1230=1230
=25=25
Since, the ball is not replaced; hence the number of balls left in bag is 29.
Hence, the probability the second ball is black:
=18C129C1=18C129C1
=1829=1829
Required probability,
=(25)×(1829)=(25)×(1829)
=36/145
B
Question: The sides of a cube measures 8cm. If the surface area of the cube is the same as a ball, what is the radius of the ball? Round to the nearest whole number.
A.3
B.8
C.7
D.6
Answer: D.6
Explanation: First calculate the surface area of the cube. The cube is made of 6 squares with the sides measuring 8cm each. The surface area of 1 side of the cube is 64cm. Multiply the surface area of the 1 side by 6 will give you the cube's total surface area. The cubes total surface area is 384cm. Now we know that the surface area of the ball is 384cm. To find out the surface area of a sphere you need to square the radius, then multiply by Pi, and multiply by the number 4. Going backwards to find the radius - you will need to dived the surface area by 96. Then divide by Pi. Then determine the square root of the answer. The radius is 5.527. Rounding to the nearest whole number the radius is 6. The correct answer is (D).
Question: A person starts walking at a speed of 5km/hr through half the distance, rest of the distance he
covers with aspeed 2km/hr. Total time of travel is 9 hours. What is the maximum distance he
can cover?
A.20km
B.40km
C.60km
D.80km
Answer: A.20km
Explanation: t=d/s, so
9=x/2*1/5+x/2*1/2(because half distance with 5 km/ph, and remaining half with 2km/hr)
9=x(18/40)
x=20km
ANSWER:A
Question: Think of a number, divide it by 4 and add 9 to it. The result is 15. What is the number thought of?
A.24
B.77
C.297
D.267
Answer: A.24
Explanation: ANSWER: A
Question: Can you find the missing number in the sequence given below
11 19 27 12 20 ? 13 21 29 14 22 30
A.21
B.20
C.28
D.23
Answer: C.28
Explanation: Solution:
28
Explanation :
The sequence is given in the puzzle is :
11 19 27 12 20 ? 13 21 29 14 22 30
Let's break the given series as below:
11 19 27
12 20 ?
13 21 29
14 22 30
Now read the number from left hand side from top to bottom as :
So the number that will replace '?' is 28.
Answer C
Question: How many odd numbers between 10 and 1400 are the squares of integers?
A.14
B.17
C.20
D.23
Answer: B.17
Explanation: The numbers are the squares of 5, 7, 9,...,37 which includes 17 numbers.
The answer is B.
Question: Percentage of profit earned by selling a book for $1320 is equal to the percentage loss incurred by selling the same book for $880. What price should the book be sold to make 30% profit?
A.$950
B.$1000
C.$1250
D.$1430
Answer: D.$1430
Explanation: Let C.P. be Rs. x.
Then,(1320 - x)	x 100 =(x - 880)	x 100
1320 - x = x - 880
2x = 2200
x = 1100
Required S.P. = 130% of 1100 = 1.30	x 1100 = $1430
Answer : D
Question: Two taps can separately fill a cistern 5 minutes and 7.5 minutes respectively and when the waste pipe is open, they can together fill it in 18 minutes. The waste pipe can empty the full cistern in?
A.3.8
B.3.7
C.3.6
D.3.9
Answer: C.3.6
Explanation: 1/5 + 1/7.5 - 1/x = 1/18
x = 3.6
Answer:C
Question: When Rahul was born, his father was 32 years older than his brother and his mother was 25 years older than his sister. If Rahul's brother is 6 years older than him and his mother is 3 years younger than his father, how old was Rahul's sister when he was born ?
A.7 years
B.10 years
C.14 years
D.19 years
Answer: B.10 years
Explanation: Explanation:
When Rahul was born, his brother's age = 6 years; his father's age = (6 + 32) years = 38 years, his mother's age = (38 - 3) years = 35 years; his sister's age = (35 - 25) years = 10 years.
Answer: Option B
Question: If n = 2ab, where a and b are distinct prime numbers greater than 2, how many different positive even divisors does n have, including n ?
A. Two
B. Three
C. Four
D. Six
Answer: C. Four
Explanation: Answer - 'C' - Four.
For a number 2ab with primes ab,there will be four even divisors - 2,2*a,2*b,2*a*b
Question: If -3x < 9, which of the following must be true?
A.x < -3
B.x < -2
C.x > -3
D.x > -2
Answer: C.x > -3
Explanation: -3x < 9
=> -x < 3
=> x > - 3
Answer C
Question: In a recent election, Ms. Robbins received 4,000 votes cast by independent voters, that is, voters not registered with a specific political party. She also received 10 percent of the votes cast by those voters registered with a political party. If N is the total number of votes cast in the election and 40 percent of the votes cast were cast by independent voters, which of the following represents the number of votes that Ms. Robbins received?
A.0.06N + 4,000
B.0.1N + 7,200
C.0.4N + 7,200
D.0.1N + 8,000
Answer: A.0.06N + 4,000
Explanation: total vote = N
vote cast by independent voters = 0.4 N
vote cast by registered voters = 0.6 N
vote received by Ms. Robbins = 4000 + 10% of vote be registered voters = 4000 + 0.06 N
Answer choice A
Question: A boy goes to his school from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming. The distance between his house and school is?
A.3
B.4
C.6
D.5
Answer: C.6
Explanation: Average speed = (2 * 3 * 2) / (3 + 2) = 12/5 km/hr.
Distance traveled = 12/5 * 5 = 12 km.
Distance between house and school = 12/2 = 6 km.
Answer:C
Question: A bowl was filled with 10 ounces of water, and 0.004 ounce of the water evaporated each day during a 50-day period. What percent of the original amount of water evaporated during this period?
A.0.004%
B.0.04%
C.0.40%
D.2%
Answer: D.2%
Explanation: Total amount of water evaporated each day during a 50-day period = .004 * 50
=.004 * 100/2
= .4/2
= .2
percent of the original amount of water evaporated during this period = (.2/10) * 100%
= 2 %
Answer D
Question: A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.150. Find the unknown rate of two blankets?
A.228
B.277
C.297
D.450
Answer: D.450
Explanation: 10 * 150 = 1500
3 * 100 + 5 * 150 = 1050
1500 – 1050 = 450.Answer: D
Question: The greatest number that divides 210, 1200 and 1450 and leaving remainder 6, 10 and 5 respectively is:
A.17
B.18
C.19
D.21
Answer: A.17
Explanation: explanation:
210-6= 204, 1200-10= 1190 and 1450-5= 1445
the highest number that can divide 204, 1190 and 1445 is HCF of numbers.
HCF of 204, 1190,1445 =17
Answer:A
Question: Grace packed 5 pairs of shoes, 3 pairs of pants, 8 shirts, and 3 jackets for her business trip. If an outfit consists of one of each item of clothing except shirts, of which she will wear 2, how many different outfits A can does Grace have available during her trip?
A. 2,520
B. 1,260
C. 620
D. 360
Answer: B. 1,260
Explanation: The idea is to multiply the number of possibilities for each item of clothing with the different items. For the shirts you essentially choose 2 out of 8 so you should use the combination forumla (don't know how to use math symbols here).
This gives you A=5 x 3 x 28 x 3 = 1'260. Hence, solution B is correct.
Question: Find the sum The difference between the compound and S.I. on a certain sum of money for 2 years at 10% per annum is Rs.15of money?
A.1500
B.2677
C.1997
D.2677
Answer: A.1500
Explanation: P = 15(100/10)2 => P = 1500
Answer: A
Question: The positive value of x that satisfies the equation (3 + 2x)^5 = (1 + 3x)^4 is between
Bunuel, can you please explain this one?
A.0 and 0.5
B.0.5 and 1
C.1 and 1.5
D.1.5 and 2
Answer: D.1.5 and 2
Explanation: Trial and error would probably be the easiest way to solve this problem. When x is large enough positive number, then because of the exponents (5>4), LHS will be more than RHS (as you increase the positive value of x the distance between the values of LHS and RHS will increase).
Try x=1 --> LHS=3^5=81*3=243 and RHS=4^4=64*4=256, so (1 + 2x)^5 < (1 + 3x)^4. As you can see LHS is still slightly less than than RHS. So, the value of x for which (1 + 2x)^5 = (1 + 3x)^4 is slightly more than 1.
Answer: D.
Question: If a certain sample of data has a mean of 15.0 and a standard deviation of 2.0, which of the following pairs contain two values that are each at least 2.5 standard deviations from the mean?
A.(8.0; 16.5)
B.(8.5; 21.0)
C.(14.0; 26.5)
D.(16.5; 26.0)
Answer: B.(8.5; 21.0)
Explanation: 2.5 standard deviation equals to 2.5*2=5;
2.5 standard deviations from the mean, so5 points, from the mean is the range from {mean-5} to {mean+5}, so from 10 to 20.
The correct answer choice must cover all this range: only answer choice B does this.
Answer: B.
Question: Two pipes A and B can separately fill a cistern in 60 minutes and 75 minutes respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 minutes. In how much time, the third pipe alone can empty the cistern?
A.90 min
B.100 min
C.110 min
D.120 min
Answer: B.100 min
Explanation: 1/50-(1/60+1/75)=-1/100
third pipe can empty in 100 minutes
ANSWER:B
Question: Two trains are moving at 50 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?
A.7 1/2 sec
B.7 1/7 sec
C.7 8/2 sec
D.7 1/9 sec
Answer: D.7 1/9 sec
Explanation: 70 + 50 = 120 * 5/18 = 100/3 mps
D = 150 + 100 = 250 m
T = 250 * 3/100 = 15/2 = 7 1/2 sec
Answer:D
Question: A, B and C rents a pasture for Rs.435. A put in 12 horses for 8 months, B 16 horses for 9 months and 18 horses for 6 months. How much should C pay?
A.135
B.227
C.268
D.198
Answer: A.135
Explanation: 12*8 :16*9 = 18*6
8: 12: 9
9/29 * 435 = 135
Answer:A
Question: According to the directions on a can of frozen orange juice concentrate, 1 can of concentrate is to be mixed with 3 cans of water to make orange juice. How many 12 ounce cans of concentrate are required to prepare 120 six-ounce servings of orange juice?
A.12
B.15
C.18
D.21
Answer: B.15
Explanation: 1 X 12 ounce can of concentrate + 3 X 12 ounce cans of water = 48 ounces of the mixture.
48 ounces of mixture gives (48 / 6 ) = 8 servings.
Thus 1 x 12 ounce can of concentrate is used to produce 8 servings of the mixture.
To make 120 servings of the mixture, we need 120 / 8 = 15 cans of the concentrate.
The answer is B.
Question: The probability that a number selected at random from the first 50 natural numbers is a composite number is -.
A.17/27
B.17/25
C.17/29
D.17/98
Answer: B.17/25
Explanation: Explanation:
The number of exhaustive events = ⁵⁰C₁ = 50.
We have 15 primes from 1 to 50.
Number of favourable cases are 34.
Required probability = 34/50 = 17/25.
Answer: Option B
Question: If 4 people are selected from a group of 6 married couples, what is the probability that none of them would be married to each other?
A.1/33
B.2/33
C.1/3
D.16/33
Answer: D.16/33
Explanation: Each couple can send only one "representative" to the committee. We can choose 4 couples (as there should be 4 members) to send only one "representatives" to the committee in C46C64 # of ways.
But these 4 chosen couples can send two persons (either husband or wife): 2∗2∗2∗2=242∗2∗2∗2=24.
So # of ways to choose 4 people out 6 married couples so that none of them would be married to each other is: C46∗24C64∗24.
Total # of ways to choose 4 people out of 12 is C412C124.
P=C46∗24C412=1633P=C64∗24C124=1633
Answer: D.
Question: If 12 men or 20 women can do a piece of work in 108 days, then in how many days can 9 men and 12 women together do the work?
A.10 days
B.30 days
C.20 days
D.80 days
Answer: D.80 days
Explanation: D
80 days
Given that 12m = 20w => 3m = 5w
9 men + 12 women = 15 women + 12 women = 27 women
20 women can do the work in 108 days. So, 27 women can do it in (20 * 108) /27 = 80 days.
Question: When a certain number X is divided by 143, the remainder is 45. Which of the following numbers, if added to X, would result in a number divisible by 14?
A.7
B.21
C.34
D.8
Answer: D.8
Explanation: So the number given is N = 143Q + 45
If this number is divided by 13, the remainder would be R[(143Q + 45)/13]
Since 143 is divisible by 13 , the product 143Q gives no remainder
This means the remainder of 45/13 should be the remainder of the entire number N
which is 6
To make it divisible by 13 , the smallest number that can be added = 14 - 6 = 8
Correct Option : D
Question: On a ferry, there are 27 cars and 13 trucks. The cars have an average mass of 1100 kg and the trucks have an average mass of 3000 kg. What is the average mass of all 40 vehicles on the ferry?
A.1515.5
B.1616.5
C.1717.5
D.1818.5
Answer: C.1717.5
Explanation: The total mass of the vehicles is 27*1100+13*3000=68700
The average mass is 68700/40=1717.5
The answer is C.
Question: Average of 10 two digit positive integer is Z. However, one number AB is taken as BA, then the average increases to Z+2.7. How many set of values for A and B are possible?
A.5
B.6
C.7
D.8
Answer: B.6
Explanation: Explanation :
Total such possible sets = (4,1), (5,2), (6,3), (7,4), (8,5) and (9,6).
(3,0) is not admissible as the numbers are of two digits.
Answer : B
Question: In a restaurant, the profit is 150% of the cost. If the cost increases by 12% but the selling price remains constant, approximately what percentage of the selling price is the profit?
A.30%
B.55%
C.90%
D.100%
Answer: B.55%
Explanation: Explanation :
Let C.P.= Rs. 100. Then, Profit = Rs. 150, S.P. = Rs. 250.
New C.P. = 112% of Rs. 100 = Rs. 112
New S.P. = Rs. 250.
Profit = Rs. (250 - 112) = Rs. 138.
Required percentage = (138 /250 *100) % = 55 % appox
Answer : B
Question: A man buys a cycle for Rs. 1400 and sells it at a loss of 15%. What is the selling price of the cycle?
A.Rs.1200
B.Rs.890
C.Rs.600
D.Rs.1190
Answer: D.Rs.1190
Explanation: Explanation:
S.P. = 85% of Rs. 1400 = Rs.(85/100*1400)=Rs.1190
Answer:D
Question: Eight people are planning to share equally the cost of a rental car. If one person withdraws from the arrangement and the others share equally the entire cost of the car, then the share of each of the remaining persons increased?
A.5/7
B.2/7
C.1/7
D.3/7
Answer: C.1/7
Explanation: Let x be the the cost of the rental car
When 8 persons share equally, share of one person = x/8
When 1 person withdraws and other 7 persons share equally, share of one person = x/7
Increase in the share = x/7−x/8=x/56
Required fraction = (x/56)/(x/8)=1/7
Answer is C.
Question: A car gets 27 miles to the gallon. If it is modified to use a solar panel, it will use only 75 percent as much fuel as it does now. If the fuel tank holds 14 gallons, how many more miles will the car be able to travel, per full tank of fuel, after it has been modified?
A.120
B.126
C.132
D.138
Answer: B.126
Explanation: Originally, the distance the car could go on a full tank was 14*27=378 miles.
After it has been modified, the car can go 27/0.75=36 miles per gallon.
On a full tank, the car can go 14*36= 504 miles, thus 126 miles more.
The answer is B.
Question: Find the roots of quadratic equation: 2x^2 + 5x + 2 = 0?
A.-2, -1/2
B.4, -1
C.4, 1
D.-2, 5/2
Answer: A.-2, -1/2
Explanation: Explanation:
2x^2 + 4x + x + 2 = 0
2x(x + 2) + 1(x + 2) = 0
(x + 2)(2x + 1) = 0 => x = -2, -1/2
ANSWER:A
Question: Running 3/4th of his usual rate, a man is 8min late. Find his usual time in hours ?
A.6/4 hrs
B.3/4 hrs
C.2/5 hrs
D.3/4 hrs
Answer: C.2/5 hrs
Explanation: Explanation:
Walking at 3/4th of usual rate implies that time taken would be 4/3th of the usual time. In other words, the time taken is 1/3rd more than his usual time
so 1/3rd of the usual time = 8min
or usual time = 3 x 8 = 24min = 24/60 hrs = 2/5 hrs.
Answer: C
Question: A certain truck uses 18 gallons of diesel fuel in traveling 230 miles. In order for the truck to travel the same distance using 10 gallons of diesel fuel, by how many miles per gallon must the truck’s fuel mileage be increased?
A.8
B.9
C.12
D.15
Answer: A.8
Explanation: There are two sets 18G1 gallons and 10G2 gallons details given.
18 gallons covering 230 miles
Then 1 G1 is used to cover 15 miles.
Now for 10 G2 covering 230 miles.
then 1 G2 is used to cover 23 miles.
There must 23 - 15 = 8 miles per gallon increment is needed for 10 gallons to improve the mileage to cover 230 miles.
IMO A is correct answer.
Question: An error 2% in excess ismade while measuring the side ofa square. The % of error in the calculated area of the square is?
A.4.00%
B.4.04%
C.4.16%
D.4.30%
Answer: B.4.04%
Explanation: 100 cm is read as 102 cm.
A1 = (100 x 100) cm2 and A2 (102 x 102) cm2.
(A2 - A1) = [(102)2 - (100)2]
= (102 + 100) x (102 - 100)
= 404 cm2.
Percentage error = 404 x 100 % = 4.04%
100 x 100
B
Question: Find the value for x from below equation: x/3=-6?
A.-16
B.11
C.-12
D.-18
Answer: D.-18
Explanation: 1. Multiply both sides by 3:
x*3/3= -6/3
Simplify both sides:
x = -18
D
Question: A train 260 m long passed a pole in 13 sec. How long will it take to pass a platform 740 m long?
A.50 sec
B.55 sec
C.60 sec
D.65 sec
Answer: A.50 sec
Explanation: Speed = 260/13 = 20 m/sec.
Required time = (260 + 740)/20 = 50 sec
Answer:A
Question: A man's speed with the current is 22 km / hr and the speed of the current is 4 km / hr. The man's speed against the current is
A.8.5 km / hr
B.9 km / hr
C.10 km / hr
D.14 km / hr
Answer: D.14 km / hr
Explanation: Sol.
Man's rate in still in water = (22 - 4) km / hr = 18 km / hr.
Man's rate against the current = (18 - 4) km / hr = 14 km / hr.
Answer D
Question: 10 men do a work in 10days. How many men are needed to finish the work in 5days?
A.50
B.20
C.30
D.10
Answer: B.20
Explanation: men required to finish the work in 5days = 10*10/5 = 20
Answer is B