RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: A freight elevator can carry a maximum load of 1150 pounds. Sean, who weighs 200 pounds, is in the elevator with two packages weighing 150 pounds and 280 pounds. If he needs to fit three more packages in the elevator that weigh as much as possible without exceeding the elevator limit, what is the difference between their average and the average of the two packages already in the elevator?
A.42
B.85
C.190
D.215
Answer: A.42
Explanation: The average of existing 2 package is150 + 280/2 = 430/2 = 215
Remaining allowed weight = 1150 - 200 - 430 = 520.
allowed per package = 520 / 3 = 173
So difference in average of existing and allowable = 215 - 173 = 42
Hence A
Question: A is twice as good a work man as B and together they finish the work in 8 days. In how many days A alone can finish the work?
A.23
B.12
C.77
D.92
Answer: B.12
Explanation: WC = 2:1
2x + x = 1/8 => x = 1/24
2x = 1/12
A can do the work in 12 days.
Answer: B
Question: In a garden, there are five blue flowers, five red flowers, five green flowers, and five pink flowers. What is the probability that a florist will choose three flowers of the same color when randomly picking three flowers?
A.11/10
B.6/55
C.31/10
D.3/55
Answer: B.6/55
Explanation: P(all the same color) = P(1st flower is ANY colorAND2nd flower is same as firstAND3rd flower is also the same color)
= P(1st flower is ANY color)xP(2nd flower is same as 1st)ANDP(3rd flower is the same color)
= 1x4/11x3/10
= 6/55
Answer: B
Question: The greatest common factor of 16 and the positive integer n is 4, and the greatest common factor of n and 45 is 3. Which of the following could be the greatest common factor of n and 120?
A.3
B.14
C.32
D.30
Answer: D.30
Explanation: Greatest common factor n and 16 is 4 = 2*2 * 2*2
Greatest common factor n and 45 is 3 = 3*3 *5
Greatest common factor n and 120 is = 2*3*5 =30
Answer: D.
Question: JERRY has 13 ten-dollar bills, 11 five-dollar bills, and 17 one-dollar bills. If JERRY needs to pay exactly $128, what is the least number of bills he will need to use?
A.16
B.35
C.46
D.577
Answer: A.16
Explanation: 128 is the total sum of money.
as we have 13 10 dollar bills so the closest we can get to 128 using the 10 dollar bills is by using 12 * 10 dollar bils
128-120 = 8
so now we need to get 8 from either 5 dollar bills or 1 dollar bills
8 - 5 (use only 1 5 dollar bill) = 3
so we can get 3 from using 3 $1 bills.
Hence 16 ( 12+1+3 )
ANSWER IS A
Question: What percent of 7.2 kg is 18 gms ?
A.25
B.66
C.288
D.19
Answer: A.25
Explanation: Explanation:
Required percentage = (18/7200 * 100)% = 1/4% = 0.25%
Answer: A) .25%
Question: Find the number of square tiles to cover the floor of a room measuring 4 m * 9 m leaving 0.30 m space around the room. A side of square tile is given to be 20 cms?
A.187
B.714
C.268
D.208
Answer: B.714
Explanation: Area of the room =3.4 * 8.4 = 28.56
Area of the tile = 0.2 *0.2=0.04
No. of tiles = 28.56/0.04 =714
Answer : B
Question: Sobha's father was 38 years of age when she was born while her mother was 36 years old when her brother four years younger to her was born. What is the difference between the ages of her parents?
A.4
B.6
C.8
D.10
Answer: B.6
Explanation: Age of Sobha's father when Sobha was born =38
Age of Sobha's mother when Sobha was born =36−4=32
Required difference of age =38−32=6
Answer is B.
Question: Find large number from below question The difference of two numbers is 1311. On dividing the larger number by the smaller, we get 11 as quotient and the 11 as remainder
A.1209
B.1324
C.1441
D.1300
Answer: C.1441
Explanation: Let the smaller number be x. Then larger number = (x + 1311).
x + 1311 = 11x + 11
10x = 1300
x = 130
Large number = 130+1311 = 1441
Answer : C
Question: If a*b*c=65, b*c*d = 65, c*d*e=1000 and d*e*f=250 the (a*f)/(c*d) = ?
A.1/2
B.1/4
C.3/4
D.2/3
Answer: B.1/4
Explanation: Explanation :
aâˆ—bâˆ—c/bâˆ—câˆ—d= 65/65 => a/d = 1
dâˆ—eâˆ—f/câˆ—dâˆ—e= 250/1000 => f/c = 1/4
a/d* f/c = 1 * 1/4 = 1/4
Answer : B
Question: The price of rice falls by 25%. How much rice can be bought now with the money that was sufficient to buy 20 kg of rice previously?
A.5 kg
B.15 kg
C.26.67 kg
D.30 kg
Answer: C.26.67 kg
Explanation: Solution: Let Rs. 100 be spend on rice initially for 20 kg.
As the price falls by 20%, new price for 20 kg rice,
= (100 -25% of 100) = 75
New price of rice = 75/20 = Rs. 3.75 per kg.
Rice can bought now at = 100/3.75 = 26.67 kg.
Answer: Option C
Question: A boat can move upstream at 46 kmph and downstream at 64 kmph, then the speed of the current is?
A.5
B.6
C.9
D.4
Answer: C.9
Explanation: US = 46
DS = 64
M = (64 - 46)/2 = 9 Answer:C
Question: 49 Ã— 49 Ã— 49 = 7^?
A.4
B.7
C.8
D.6
Answer: D.6
Explanation: 49 Ã— 49 Ã— 49 = 7?
or, 7(2) Ã— 7(2) Ã— 7(2) = 7?
or 7(6) = 7? or, ? = 6
Answer D
Question: In an election only two candidates contested 20% of the voters did not vote and 120 votes were declared as invalid. The winner got 200 votes more than his opponent thus he secured 41% votes of the total voters on the voter list. Percentage votes of the defeated candidate out of the total votes casted is:
A.22
B.389
C.38
D.45
Answer: D.45
Explanation: Let there be x voters and k votes goes to loser then
0.8x - 120 = k + (k + 200)
k+200 = 0.41x
\inline \Rightarrow k = 1440
and (k + 200) =1640
Therefore \inline \frac{1440}{3200}\times 100 = 45%
Answer: D) 45%
Question: Lloyd normally works 7.5 hours per day and earns $4.50 per hour. For each hour he works in excess of 7.5 hours on a given day, he is paid 2.0 times his regular rate. If Lloyd works 10.5 hours on a given day, how much does he earn for that day?
A.$33.75
B.$47.25
C.$60.75
D.$54.00
Answer: C.$60.75
Explanation: Daily working hour*Regular Rate + Overtime*Increased Rate
7.5*4.5+ 3*4.5*2.0=60.75
Answer C
Question: A cylindrical cube of radius 12 cm contains water upto a depth of 20 cm. A spherical iron ball is dropped into the tub and thus the level of water is raised by 6.75 cm. The radius of the ball is :
A.7 cm
B.8.5 cm
C.9 cm
D.9.5 cm
Answer: C.9 cm
Explanation: Sol.
Let the radius of the ball be r cm.
Volume of ball = Volume of water displaced by it.
∴ 4/3 ∏r³ = ∏ * 12 * 12 * 6.75
⇒ r³ = 9 * 9 * 9 ⇒ r = 9 cm.
Answer C
Question: 9 examiners can examine a certain number of answer books in 12 days by working 5 hours a day. How many hours in a day should 4 examiners work to examine twice the number of answer books in 30 days?
A.9
B.10
C.11
D.12
Answer: A.9
Explanation: Explanation:
Let required number of hours be x
More examiners, less hours (indirect proportion)
More days, less hours (indirect proportion)
More answer books, more hours (direct proportion)
Hence we can write as
(examiners) 9:4
(days) 12:30
(answer books) 2:1 }::x:5
⇒9×12×2×5=4×30×1×x
⇒x=9×12×2×5/4×30×1
=9×3×2×5/30
=9×2×5/10
=9
Answer: Option A
Question: Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?
A.5 min
B.2 min
C.6 min
D.10 min
Answer: D.10 min
Explanation: Explanation:
Due to stoppages, it covers 9 km less.
Time taken to cover 9 km =(9/24*60)=10 min
ANSWER:D
Question: what is the least number. which should be added to 0.0478 to make it a perfect square?
A.0.0002
B.0.0004
C.0.0006
D.0.0008
Answer: C.0.0006
Explanation: 0.0478+0.0006=0.0484
(0.22)^2
ANSWER:C
Question: The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 15. The larger of the two numbers is:
A.276
B.299
C.322
D.345
Answer: D.345
Explanation: Clearly, the numbers are (23 x 13) and (23 x 15).
Larger number = (23 x 15) = 345. Answer: Option D
Question: A painting 2 inches wide is placed around a rectangular board with dimensions 8 inches by 12 inches. What is the area of the painting, in square inches?
A.144
B.196
C.96
D.144
Answer: C.96
Explanation: This question is an example of a 'punch out' question - we have to find the area of EVERYTHING, then 'punch out' the part that we don't want.
We're told that a painting 2 inches wide is placed around a rectangular board with dimensions 8 inches by 12 inches. We're asked for the area of the painting , in square inches.
Area of a rectangle = (length)(width)
So the area of the board is... (8)(12) = 96
The painting 'adds' 2 inches to the top, bottom, left and right 'sides' of the picture, so the area of EVERYTHING is...
(8+2+2)(12+2+2) = (12)(16) = 196
When we 'punch out' the area of the rectangular board , we'll be left with the area of the FRAME:
192 - 96 = 96
Final Answer:
C
Question: A can do a work in 10days and B can do the same work in 8 days. They work together for 3days and then A goes away. In how many days will B finish the work?
A.11/17days
B.21/40days
C.31/40days
D.14/21days
Answer: C.31/40days
Explanation: A+B can do the work in 3 days = 3( 1/10 + 1/8) = 9/40
Rest of the work = 1 - 9/40 = 31/40
B will do the rest of the work in = 1 - 9/40 = 31/40days
Answer is C
Question: Ron has a cycle worth $ 1800 and he wants to sell it at a profit of $ 220. What should cycles selling price be?
A.2690
B.1790
C.1890
D.2020
Answer: D.2020
Explanation: Cost Price = $ 1800
Profit = $ 220
Selling Price = Cost Price + Profit
Selling Price = 1800 + 220
= $ 2020
Selling price of the cycle = $ 2020 ANSWER : D
Question: Of the six-digit positive integers that have no digits equal to zero, how many have two digits that are equal to each other and the remaining digit different from the other two?
A.2443200
B.3643200
C.5443200
D.1443200
Answer: C.5443200
Explanation: Of the six-digit positive integers that have no digits equal to zero, how many have two digits that are equal to each other and the remaining digit different from the other two?
A. 24
B. 36
C. 72
D. 144
E. 216
Choosing the digit for p - 9 ways;
Choosing the digit for q - 8 ways;
Choosing the digit for r - 7ways;
Choosing the digit for s - 6ways;
Choosing the digit for t - 5ways;
# of permutations of 3 digits in ppqrst - 6!/2!
Total: 9*8*7*6*5*6!/2!=5443200.
Answer: C.
Question: A certain sum of money at simple interest amounted Rs.980 in 3 years at 5% per annum, find the sum?
A.867
B.855
C.299
D.852
Answer: D.852
Explanation: 980 = P [1 + (3*5)/100]
P = 852
Answer: D
Question: A sum of money is to be distributed among A, B, C, D in the proportion of 5 : 2 : 4 : 3. If C gets Rs. 1000 more than D, what is B's share?
A.2000
B.2500
C.2400
D.2600
Answer: A.2000
Explanation: Let the shares of A, B, C and D be Rs. 5x, Rs. 2x, Rs. 4x and Rs. 3x respectively.
Then, 4x - 3x = 1000
x = 1000.
B's share = Rs. 2x = Rs. (2 x 1000) = Rs. 2000.
ANSWER A
Question: If 6^e is a factor of (10!)^2, What is the greatest possible value of e ?
A.2
B.4
C.6
D.8
Answer: D.8
Explanation: e 10!= 10*9*8*7*6*5*4*3*2*1 = 2*5*3*3*2*2*2*7*2*3*5*2*2*3*2 = 2^8*3^4*5^2*7
6= 2*3
Therefore only the exponents of 2 and 3 are relevant, 2^8 or 3^4 -> higher number counts = 8 -> Answer Choice D
Question: A salt manufacturing company produced a total of 2500 tonnes of salt in January of a particular year. Starting from February its production increased by 100 tonnes every month over the previous months until the end of the year. Find its ave66rage daily production for that year?
A.100
B.105
C.109
D.120
Answer: A.100
Explanation: Total production of salt by the company in that year = 2500 + 2600 + 2700 + .... + 3600 = 36600.
Average monthly production of salt for that year = 36600/365 â‰ˆ 100
ANSWER:A
Question: Each of the 11 letters A, H, I, M, O, T, U, V, W, X and Z appears same when looked at in a mirror. They are called symmetric letters. Other letters in the alphabet are asymmetric letters. How many two letter computer passwords can be formed (no repetition allowed) with at least one symmetric letter?
A.2,420
B.6,435
C.12,100
D.12,870
Answer: A.2,420
Explanation: Since we are given atleast one symmetric letter in the three letter word we can take the following cases
1. All two
2. One symmetry and other two non
4. All the two letters can be arranged in 2 ways
( 11c2+ 11c1 * 15c2) *2
( 11*10/ 2 + 11 * 15 * 14 / 2 ) * 2
2420
IMO option A is the correct answer..
OA please...will correct if I missed anything..
Question: A ladies hostel had provision of food for 200 women for 35 days. After 10 days, 25 women left the hostel. The number of days for which the remaining food will last is:
A.28.97
B.28.0
C.28.47
D.27.47
Answer: C.28.47
Explanation: Explanation :
After 10 days : 200 women had food for 25 days.
Suppose 175 women had food for x days.
Now, Less women, More days (Indirect Proportion)
175 : 200 :: 25 : x
=> 175 x x = 200 x 25
=> x = 200 x 25 / 175
=> x =28.47
Answer : C
Question: A toy train produces at least 10 different tunes when it moves around a circular toy track of radius 5 meters, at 10 meters per minute. However, the toy train is defective and it now produces only two different tunes at random. What is the probability that the toy train produces 3 music tunes of the same type (1 in _____ ) ?
A.3
B.9
C.8
D.4
Answer: D.4
Explanation: 1/2^3=1/8 but here der r two types of tone and we need to find the odds of d train of two tones to form 3 tones consequently so 2*1/8= 1/4 so ans is 4
ANSWER:D
Question: Average of 10 matches is 34, How many runs one should should score to increase his average by 5 runs.
A.A)70
B.B)76
C.C)78
D.D)89
Answer: D.D)89
Explanation: Explanation:
Average after 11 innings should be 39
So, Required score = (11 * 39) - (10 * 34)
= 429 - 340 = 89
Answer: Option D
Question: Let x be a positive integer, what is the remainder when 4^(2x+5)+3 is divided by 5?
A.2
B.3
C.4
D.1
Answer: C.4
Explanation: For: (4^(2x+5)+3)/5
Let n = 2x + 5
4^n
4^1 = 4
4^2 = 16
4^3 = 64
4^4 = 256, last digit pattern repeats 4, 6, 4, 6, ....
Rule: x^(m+n) = (x^m)(x^n)
(4^(2x))(4^5)
Rule: x^(mn) = (x^m)^n
(4^2)(4^x)(4^5) => Now, (6)(4)(4) + 3 = (6) + 3 => Finally, 9/5 and remainder is 4.
Answer: C
Question: Find the L.C.M of 36,90,210
A.630
B.2520
C.1260
D.1360
Answer: C.1260
Explanation: 36=2^2*3^2 90=3^2*2*5 210=2*5*3*7
L.C.M=2^2*3^2*5*7=1260
Answer=(C)
Question: On average, activated yeast cells divide once every 120 minutes; that is, each individual cell divides into two individual cells over that time span. Given that a certain yeast colony consisted of 150,000 cells two hours ago, approximately how many cells will be populating the colony six hours from now?
A.77,500
B.1,860,000
C.2,400,000
D.3,720,000
Answer: C.2,400,000
Explanation: 150,000 × 2 × 2×2×2 = 150,000 × 16 = C
Question: The value of y^2+2y-(2yy) when y=3 is:
A.-2
B.-3
C.4
D.-1
Answer: B.-3
Explanation: 3^2+2*3-(2*3*3)
9+2*3-(18)
9+6-18
15-18=-3
answer B
Question: A man can row 6 kmph in still water. When the river is running at 1.2 kmph, it takes him 1 hour to row to a place and black. What is the total distance traveled by the man?
A.5.75
B.5.7
C.5.76
D.5.71
Answer: C.5.76
Explanation: M = 6
S = 1.2
DS = 7.2
US = 4.8
x/7.2 + x/4.8 = 1
x = 2.88
D = 2.88 * 2 = 5.76
Answer:C
Question: list of salaries of 7 employees are listed below. What is the median salary?
$40,000, $29,000, $35,500, $31,000, $30,000, $27,000, $32,000
A.$28,000
B.$28,500
C.$30,200
D.$31,000
Answer: D.$31,000
Explanation: Ordering the data from least to greatest, we get:
$27,000, $29,000, $30,000, $31,000, $32,000, $35,500, $40,000
Since there is an odd number of items in the data set, we compute the median by taking the middle number
The median salary is $31,000.
Answer : D
Question: The length of a rectangle is two - fifths of the radius of a circle. The radius of the circle is equal to the side of the square, whose area is 1225 sq.units. What is the area (in sq.units) of the rectangle if the rectangle if the breadth is 10 units?
A.140 sq.units
B.219 sq.units
C.287 sq.units
D.216 sq.units
Answer: A.140 sq.units
Explanation: Given that the area of the square = 1225 sq.units
=> Side of square = √1225 = 35 units
The radius of the circle = side of the square = 35 units Length of the rectangle = 2/5 * 35 = 14 units
Given that breadth = 10 units
Area of the rectangle = lb = 14 * 10
= 140 sq.units
Answer: A
Question: Tammy climbed a mountain in two days. She spent a total of 14 hours climbing the mountain. On the second day, she walked at an average speed that was half a kilometer per hour faster, but 2 hours less than what she walked on the first day. If the total distance she climbed during the two days is 52 kilometers, how many T kilometers per hour did Tammy walk on the second day?
A.3
B.3.5
C.4
D.4.5
Answer: C.4
Explanation: Ans: C
Total time = 14 hrs
Let time traveled during 1st day = x
Let time traveled during 2nd day = x-2
Total time =14
x+x-2 = 14
x=8
speed * time = distance
s*8 + (s+0.5)(8-2) = 52
solving s = 4.5
now speed for 2nd day is 0.5 less than the 1st day which is 4.5
Thus speed for 2nd day = 4
Its simple algebra for s*8 + (s+0.5)(8-2) = 52 but for some reason Im getting 3.5 and not 4.5.
8s+6s+3=52
14s=49
s=3.5
Question: If x and y are both prime numbers greater than 10, which of the following CANNOT be true?
I. xy is an even number.
II. The difference between x and y equals 117.
III. The sum of x and y is even.
A. I only
B. II and III only
C. I and III only
D. I and II only
Answer: D. I and II only
Explanation: MANHATTAN GMATOFFICIAL SOLUTION:
Since x and y are both prime numbers greater than 10, they must both be odd. Therefore xy must be an odd number, so Statement I cannot be true. Similarly, if x and y are both odd, then x - y cannot equal 117 (an odd number). This difference must be even. Therefore, Statement II cannot be true. Finally, since x and y are both odd, x + y must be even, so Statement III will always be true. Since Statements I and II CANNOT be true, but Statement III IS true,the correct answer is (D).
Answer : D
Question: What is the difference between the compound interest on Rs.12000 at 20% p.a. for one year when compounded yearly and half yearly?
A.399
B.383
C.120
D.288
Answer: C.120
Explanation: When compounded annually, interest
= 12000[1 + 20/100]1 - 12000 = Rs.2400
When compounded semi-annually, interest
= 12000[1 + 10/100]2 - 12000 = Rs.2520
Required difference = 2520 - 2400 = Rs.120
Answer: C
Question: Two cars cover the same distance at the speed of 50 and 64 kmps respectively. Find the distance traveled by them if the slower car takes 1 hour more than the faster car.
A.212 km
B.214 km
C.224 km
D.216 km
Answer: B.214 km
Explanation: 50(x + 1) = 64x
X = 3.57
60 * 3.57 = 214 km
ANSWER:B
Question: 1 barrel of gas is enough to power the lawnmower to mow both you and your neighbor's lawn 15 times before refilling. You're son decided he's going take over mowing these lawns and also mow 6 more neighbor's lawns. How many times will he be able to mow your lawn and the neighbor's lawns before refilling the barrel of gas?
A.4.15
B.2.75
C.1.875
D.3.75
Answer: D.3.75
Explanation: First set up a ratio with all the relevant values and also the unknown variable:
2*15 = 8*x
Now solve by multiplying 2 by 15 and then dividing that product by 8:
2*15 = 30
30/8 = x
x = 3.75
The value of x equals how many times 8 lawns can be mowed on one 1 barrel of gas.
Answer: D
Question: How many words can be formed from the letters of the word ‘EXTRA’ so that the vowels are never together?
A.72
B.25
C.14
D.65
Answer: A.72
Explanation: Sol. The given word contains 5 different letters.
Taking the vowels EA together, we treat them as one letter.
Then, the letters to be arranged are XTR (EA).
These letters can be arranged in 4! = 24 ways.
The vowels EA may be arranged amongst themselves in 2! = 2 ways.
Number of words, each having vowels together = (24x2) = 48 ways.
Total number of words formed by using all the letters of the given words
= 5! = (5x4x3x2x1) = 120.
Number of words, each having vowels never together = (120-48) = 72.
Ans:A
Question: A cistern which could be filled in 9 hours takes one hour more to be filled owing to a leak in its bottom. If the cistern is full in what time will the leak empty it?
A.33
B.77
C.28
D.90
Answer: D.90
Explanation: 1/9 - 1/x = 1/10
=> 90 hrs
Answer:D
Question: Amy, Bob, Cindy, and Daniel all have the same birthday, but they are all different ages. Today is their birthday. Cindy's age is divisible by Bob's age, and Amy's age is divisible by Cindy's age. If A is Amy's age in years, B is Bob's age, and C is Cindy's age, which of the following CANNOT be Daniel's age?
A.AC/B
B.(A+C)/B
C.(A+B)/C
D.AB/C
Answer: C.(A+B)/C
Explanation: Since today's is Daniel's birthday, his age must be an integer. As per the question, let A = 12, B = 2, and C = 6. Plugging these into the answer choices, only C does not yield an integer.
Question: A and B go around a circular track of length 600 m on a cycle at speeds of 30 kmph and 60 kmph. After how much time will they meet for the first time at the starting point?
A.120 sec
B.176 sec
C.178 sec
D.72 sec
Answer: D.72 sec
Explanation: Time taken to meet for the first time at the starting point
= LCM { length of the track / speed of A , length of the track / speed of B}
= LCM { 600/ (30 * 5/18) , 600/ (60 * 5 /18) }
= 72 sec.
Answer: D
Question: J and M were each paid x dollars in advance to do a certain job together. J worked on the job for 10 hours and M worked for 4 hours less than J. If M gave J y dollars of her payment so that they would have received the same hourly wage, what was the dollar amount, in terms of y, that J was paid in advance?
A.a)4y
B.b)5y
C.c)6y
D.d)8y
Answer: A.a)4y
Explanation: J and M were both paid x dollars
If M gave Y dollars from her X to J then at the end
J will have X+Y dollars
M will have X- Y dollars
Now since the hourly wages have to be same then
Hourly wage of J = (X+Y) / 10 (Since J worked for 10 hrs)
Hourly wage of M = (X-y) /6 (Since M worked 4 hrs less than J)
Equating both
(X+Y)/10=(X-Y)/6
on simplifying X=4y
Answer A
Question: In a certain sequence , the first term is 1, and each successive term is 1 more than the reciprocal of the term that immediately precedes it. What is the fifth term of the sequence?
A. 3/5
B. 5/8
C. 8/5
D. 5/3
Answer: C. 8/5
Explanation: First term = 1
Second term = (1/1)+ 1 = 2
Third Term = (1/2)+1 = 3/2
Forth Term = [1/(3/2)]+1 = 5/3
Fifth Term = [1/(5/3)]+1 = 8/5
Answer: Option C
Question: An error 2% in excess is made while measuring the side ofa square. The % of error in the calculated area of the square is?
A.4%
B.4.04%
C.4.12%
D.4.17%
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: Mayank, Mirza, Little and Jaspal bought a motorbike for $60. Mayank paid one-half of the sum of the amounts paid by the other boys. Mirza pad one-third of the sum of the amounts paid by the other boys. Little paid one-fourth of the sum of the amounts paid by the other boys. How much did Jaspal have to pay?
A.$15
B.$13
C.$17
D.None of these
Answer: B.$13
Explanation: Explanation :
Mayank paid 1/2 of what others paid.
=> Mayank paid 1/3 rd of the total amount = $20.
Similarly, Mirza paid $15 and Little paid $12.
Remaining amount of $60 - $20 - $15 - $12 = $13 is paid by Jaspal.
Answer : B