RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: If x^2 - 4 = 0 and x > 0, which of the following must be equal to 0 ?
A. x^2 - 2x
B. x^2 - 9x + 20
C. x^2 - 2x + 3
D. x^2 + 2x - 3
Answer: A. x^2 - 2x
Explanation: x^2-4 = 0
x= +2 or x = -2
if we substitute x= 2 in the equation x^2 - 2x = 4-4 = 0
A is also the answer
Question: If the number is divided by 3, it reduced by 42. The number is
A.A)51
B.B)63
C.C)45
D.D)40
Answer: B.B)63
Explanation: Explanation:
Let the number be x. Then,
x - (x/3) = 42 => 2x/3 = 42
=> x = 63
Answer: Option B
Question: 30 is what percent of 100?
A.35%
B.30%
C.45%
D.50%
Answer: B.30%
Explanation: 30/100×100=30% ANSWER : B
Question: On a sum of money, the simple interest for 2 years is Rs.660, while the compound interest is Rs.696.30, the rate of interest being the same in both the cases. The rate of interest is
A.10%
B.11%
C.12%
D.10.5%
Answer: B.11%
Explanation: Solution
Difference in C.I and S.I for 2 years	= Rs(696.30-660)
=Rs. 36.30.
S.I for one years	= Rs330.
S.I on Rs.330 for 1 year	=Rs. 36.30
Rate	= (100x36.30/330x1)%
=11%.
Answer B
Question: During the last four years, a large truck company purchased diesel at rates of $1.2, $1.3, $1.8 and $2.1 per gallon. What was the mean cost of diesel over the four-year period if the company spends the same amount of dollars on diesel each year?
A.$2.5
B.$2.55
C.$1.52
D.$3.25
Answer: C.$1.52
Explanation: finding the Harmonic mean here.
HM = 4/(1/12 + 1/13 + 1/18 + 1/21) = 15.18
C
Question: If n is an integer and 101n^2 is less than or equal to 10000, what is the greatest possible value of n?
A.7
B.8
C.9
D.10
Answer: C.9
Explanation: 101 * n^2 <=10000
n^2 <=10000/101 which will be less than 100 since 10000/100 = 100 which is the square of 9
Next closest value of n where n^2<=100 is 9
Ans C
Question: Reema took a loan of Rs 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest.
A.5%
B.6%
C.7%
D.8%
Answer: B.6%
Explanation: Explanation:
Let rate = R% then Time = R years.
=>1200∗R∗R /100=432
=>R2=36
=>R=6%
Option B
Question: A and B complete a work in 6 days. A alone can do it in 10 days. If both together can do the work in how many days?
A.3.75 days
B.4 days
C.5 days
D.6 days
Answer: A.3.75 days
Explanation: Explanation:
1/6 + 1/10 = 8/30 = 4/15
15/4 = 3.75 days
Answer: A
Question: John has 5 friends who want to ride in his new car that can accommodate only 4 people at a time (John plus 3 passengers). How many different combinations of 3 passengers can be formed from the 5 friends?
A.3.
B.8.
C.10.
D.15.
Answer: C.10.
Explanation: 5C3 = 10
The answer is C.
Question: 57, 55, 50, 48, 43, 41, ?
A.30
B.23
C.36
D.25
Answer: C.36
Explanation: This is a simple alternating subtraction series, with a pattern -2, -5, -2, -5 ....
Answer : C.
Question: which one is odd?
4377
3954
9864
8454
9831
A.4377
B.3954
C.9864
D.8454
Answer: C.9864
Explanation: Correct Answer : C
sum of digit of all other number is 21, but sum of digit of 9864 is 27
Question: x percent of y percent of z is decreased by y percent, What is the result?
A.(100xyz - xy^3z) / 1,000,000 *(-1/48)
B.(xz - y) / 100
C.(xz - y) / 10,000
D.(xyz - 2y) / 100
Answer: A.(100xyz - xy^3z) / 1,000,000 *(-1/48)
Explanation: We're told that X percent of Y percent of Z is DECREASED by Y percent. We're asked for the result of all of this math.
IF....
X = 10
Y = 50
Z = 100
First, 50% of 100 = 50
Next, 10% of 50 = 5
Finally, 5 decreased by 50% of itself is 2.5
So we're looking for an answer that equals 2.5 when X=10, Y=50 and Z=100.
Answer A. (100xyz - xy^2z) / 1,000,000 = (5,000,000 - 2,500,000)/1,000,000 *(-1/48) = 2,500,000/1,000,000 = 2.5
This is a MATCH
A
Question: I forgot the last digit of a 7-digit telephone number. If 1 randomly dial the final 3 digits after correctly dialling the first four, then what is the chance of dialling the correct number?
A.1/1001.
B.1/1000
C.1/999
D.1/990
Answer: B.1/1000
Explanation: Explanation :
Given, the last three digits are randomly dialled, then each of the digit can be selected out of 10 digits in 10 ways.
Hence, the required probability is:-
=>(1/10)3.
=>1/1000.
Answer : B
Question: x an y are two truck parks 500 km apart, if a truck leaves park x at 9 a.m. and travels at a speed of 70 kmph at what time will the first truck meet the second truck which left station y at 10am and travels at a speed of 50 kmph
A.1.30 p.m
B.2.30 p.m
C.11.30 a.m
D.12.30 p.m
Answer: A.1.30 p.m
Explanation: Suppose they meet x hours after 9 a.m.
Distance moved by first truck in x hours + distance moved by 2nd truck in x-1 hrs = 500
70x+50(x-1) = 500
70x+50x-50= 400
120x= 450
x = 4.5
So they meet 4.5 hr after 9 a.m. which is at 1.30 p.m.
Answer is A
Question: If 40 percent of all students at college X have brown hair and 70 percent of all students at college X have blue eyes what is the difference between the minimum and maximum probability of picking a student from college X who has neither brown hair nor blue eyes?
A.0.2
B.0.3
C.0.4
D.0.6
Answer: B.0.3
Explanation: Max value for y = minimum of (40,70).
Because the number of students with brown hair is 40, the maximum number of students to have both brown hair and blue eyes can only be 40.
When y=40
x=30
Probability of selecting 30 students out of 100 students = 30/100 = 0.3
x will be minimum when y is minimum.
The minimum possible value for y=10
x = y-10
x=0
Because if "y" gets less than 10; the number of students get more than 100 which is not possible.
In this case; 0 students fit the criterion of not having either. Because all students have brown hair, blue eyes or both.
Probability becomes 0/100 = 0
Difference between two probabilities = 0.3-0 = 0.3
Ans: "B"
_______
Question: If John runs in the speed of 9 km/hr from his house, in what time will he reach the park which is 300 m long from his house?
A.2
B.4
C.5
D.3
Answer: A.2
Explanation: Speed = 9 * 5/18 = 2.5 m/sec
Time taken = 300/2.5 = 120 sec ie. 2 mins.
Answer:A
Question: If 195,001, football shoes need to be placed in boxes and each box can contain at most 3 pair of football shoes. How many pair of football shoes will be in the last unfilled box?
Options:
A.1football shoes
B.3 football shoes
C.4 football shoes
D.7 football shoes
Answer: A.1football shoes
Explanation: The number of football shoes that can be placed in boxes of 3 football shoes is the first number that is divisible by 3 that occurs before 195,001.
In order to divide the sum in 3 parts, the amount must be divisible by 3
Divisibility rule of 3: The sum of the digits must be divisible by 3
Sum of digits of 195,001 =1+9+5+0+0+1=16 and 1+6=7 is not divisible by 3
Hence, we need to remove 1 to this number for it to be divisible by 3
Correct Option: A
Question: A train 240 m in length crosses a telegraph post in 16 seconds. The speed of the train is?
A.50 kmph
B.52 kmph
C.54 kmph
D.56 kmph
Answer: C.54 kmph
Explanation: Explanation:
S = 240/16 * 18/5 = 54 kmph
ANSWER IS C
Question: 2, -6, 18, -54, 162, (...)
A.-486
B.486
C.-428
D.422
Answer: A.-486
Explanation: 2 × -3 = -6
-6 × -3 = 18
18 × -3 = -54
-54 × -3 = 162
162 × -3 = -486
Answer is A
Question: If the area of the equilateral triangle above is 0.75, what is the area of the adjacent square?
A.(√3)/2
B.√3
C.√6
D.3
Answer: B.√3
Explanation: Area of equilateral triangle: a^2*(square root of 3)/4 = 0.75
Hence, area of square = a^2 = 0.75 *4/ (square root of 3) = 3/ (square root of 3) = square root of 3
Answer: B
Question: When Robert discontinued his retainer-ship contract with a Pvt Company, management held his fees Rs. 15000/- for one month. Earlier Robert had completed a work worth fees of 7280/- from company, which was still not paid. But Robert forgot that. After one month Robert asked his fees and accountant gives Rs.18500/- to him. What is the incentive amount given to Robert?
A.A)9500
B.B)12500
C.C)10780
D.D)10500
Answer: C.C)10780
Explanation: Total fees = Rs.15000/-
Earlier fees not paid = 7280/-
Balance Salary = 15000-7280= 7720
Paid amount = 18500/-
Incentive amount = 18500-7720 = 10780/-
Answer is C
Question: The difference between the local value and the face value of 9 in the numeral 62975148 is
A.899999
B.899991
C.899891
D.899981
Answer: B.899991
Explanation: Explanation:
(Local value of 9) - (Face value of 9) = (900000 - 9) = 899991
B)
Question: A salesman’s terms were changed from a flat commission of 5% on all his sales to a fixed salary of Rs.1300 plus 2.5% commission on all sales exceeding Rs. 4,000. If his remuneration as per new scheme was Rs. 600 more than that by the previous schema, his sales were worth?
A.12028
B.12000
C.12019
D.12197
Answer: C.12019
Explanation: [1300 + (X-4000) * (2.5/100)] - X * (5/100)
= 600
X = 18000
Answer: C
Question: How many five-digit numbers exist such that the product of their digits is 400?
A.60
B.120
C.180
D.30
Answer: B.120
Explanation: We're asked to name all of the 5-digit numbers whose product-of-digits is 400. We can use prime-factorization to figure out the digits, BUT this comes with a "twist".....NOT ALL of the digits have to be primes....
400 = (25)(16)
The 25 = (5)(5) and there's no way around that. Every option MUST have two 5s as two of the digits.
The 16 can be broken down in a few different ways though:
16 = (1)(2)(8)
16 = (1)(4)(4)
16 = (2)(2)(4)
Each of those options has to be accounted for.
So, we have 3 sets of 5 digits:
1) 1, 2, 8, 5, 5 --> This gives us 5!/2! arrangements = 120/2 = 60 different 5-digit numbers.
2) 1, 4, 4, 5, 5 --> This gives us 5!/(2!2!) arrangements = 120/4 = 30 different 5-digit numbers.
3) 2, 2, 4, 5, 5 --> This gives us 5!/(2!2!) arrangements = 120/4 = 30 different 5-digit numbers.
60 + 30 + 30 = 120 different 5-digit numbers
Final Answer:B
Question: A starts business with a capital of Rs.1200 B and C join with some investments after 3 and 6 months respectively. If the end of a year, the profit is divided in the ratio 2:3:5 respectively. What is B's investment in the business?
A.2400
B.2782
C.2097
D.7922
Answer: A.2400
Explanation: 1200 * 12: x * 9 = 2:3
x = 2400
Answer: A
Question: Look at this series: 32, 35, 33, 36, 34, 37, ... What number should come next?
A.39
B.31
C.35
D.32
Answer: C.35
Explanation: This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; in the second, 2 is subtracted.
The answer is option C (35)
Question: Raman buys an old scooter for Rs. 5000 and spends Rs. 1000 on its repairs. If he sells the scooter for Rs. 7200, his gain percent is :
A.20%
B.12%
C.10%
D.5%
Answer: A.20%
Explanation: Explanation :
Solution: C.P. =Rs. (5000+1000) =Rs. 6000; S.P. = Rs. 7200.
Gain% = (1200*100/6000) = 20%.
Answer : A
Question: 8 machines, each working at the same constant rate, together can complete a certain job in 24 days. How many additional machines, each working at the same constant rate, will be needed to complete the Job in 16 days?
A.2
B.3
C.4
D.6
Answer: C.4
Explanation: Another solution which is faster is Since each machine works at a constant rate. The time needs to bought down from 24 to 16. So the new time is 2/3 of the original time. Thus to achieve this we need the rate to be 3/2 of original.
So 3/2* 8 = 12
So we need 12-8 = 4 more machines.
Answer : C
Question: A wheel that has 3 cogs is meshed with a larger wheel of 7 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions made by the larger wheel is:
A.9
B.10
C.6
D.8
Answer: A.9
Explanation: Explanation :
Let the required number of revolutions made by larger wheel be x.
Then, More cogs, Less revolutions (Indirect Proportion)
7:3::21:x => 7 * x = 21 * 3
=> x = (21 * 3)/7
=> x = 9
Answer : A
Question: A tour group of 25 people paid a total of $650 for entrance to a museum. If this price included a 5% sales tax, and all the tickets cost the same amount, what was the face value of each ticket price without the sales tax?
Choices
A.$24.7
B.$23.94
C.$24
D.$25.20
Answer: A.$24.7
Explanation: A.
Question: Find out the number of ways in which 6 rings of different types can be worn in 3 fingers?
A.321
B.729
C.451
D.152
Answer: B.729
Explanation: The first ring can be worn in any of the 3 fingers (3 ways).
Similarly each of the remaining 5 rings also can be worn in 3 ways.
Hence total number of ways
=3×3×3×3×3×3=36=729
Ans: B
Question: A cube marked 1, 2, 3, 4, 5, and 6 on its six faces. Three colors, red, blue, and green are used to paint the six faces of the cube. If the adjacent faces are painted with the different colors, in how many ways can the cube be painted?
A.3
B.6
C.8
D.12
Answer: B.6
Explanation: There are 4 adjacent sides for every face of the cube.
Let's say side 1 is painted red, then the 4 adjacent sides can be either green or blue alternating. This can be done in 2 ways.
GBGB
BGBG
Sixth side should be the same color as side 1.
For each color chosen for side 1(and side6) there are 2 ways of painting side 2,3,4 and 5.
No. of colors that can be chosen for side 1(and side6) is 3.
So 3*2 = 6..
ANSWER:B
Question: Find two consecutive integers whose sum is equal 129.
A.63
B.64
C.65
D.66
Answer: C.65
Explanation: Let x and x + 1 (consecutive integers differ by 1) be the two numbers. Use the fact that their sum is equal to
129 to write the equation
x + (x + 1) = 129
Solve for x to obtain
x = 64
The two numbers are
x = 64 and x + 1 = 65
We can see that the sum of the two numbers is 129.
Answer C
Question: Which is the smallest number divides 2800 and gives a perfect square.
A.5
B.6
C.7
D.8
Answer: C.7
Explanation: 7 is the smallest number which divides 2800 and gives a perfect square.
As 2800=2*2*2*2*5*5*7 and 7 is not in a pair which gives 400(a perfect square of 20) on dividing 2800.
ANSWER:C
Question: Sum of ages of two friends is 34 while difference is 2 then their ages are
A.18 years, 16 years
B.17 years, 15 years
C.16 years, 18 years
D.18 years, 16 years
Answer: A.18 years, 16 years
Explanation: 18,16
ANSWER:A
Question: If 4 men working 10 hours a day earn Rs. 1600 per week, then 9 men working 6 hours a day will earn how much per week?
A.Rs 840
B.Rs 1320
C.Rs 1620
D.Rs 2160
Answer: D.Rs 2160
Explanation: Explanation :
(Men 4:9) : (Hrs/Day 10:6) :: 1600 : x
hence 4 * 10 *x = 9 * 6 * 1600
or x = 9*6*1600/ 4*10 = 2160
Answer : D
Question: Two pipes P and Q can fill a cistern in 12 and 19 minutes respectively. Both are opened together, but at the end of 3 minutes the first is turned off. How much longer will the cistern take to fill?
A.11 1/2 min
B.14 1/4 min
C.11 2/4 min
D.11 1/5 min
Answer: B.14 1/4 min
Explanation: 3/12 + x/19 = 1
x= 14 1/4
Answer: B
Question: 20 beavers, working together in a constant pace, can build a dam in 3 hours. How many hours X will it take 12 beavers that work at the same pace, to build the same dam?
A.2.
B.4.
C.X=5.
D.X=6.
Answer: C.X=5.
Explanation: C. 5 hrs
If there were 10 beavers it qould have taken double X = 6hrs.. so closest to that option is 5.
Question: Triangle XYZ is an isosceles right triangle. If side XY is longer than side YZ, and the area of the triangle is 64, what is the measure of side XY?
A.4
B.16
C.8
D.8√2
Answer: B.16
Explanation: ans B ..16.
xy being larger means it is the hyp..
area =(1/2)*(yz)^2=64 or yz=8*\sqrt{2}..
therefore hyp=xy=16
Question: A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 70 paise per sq m is
A.Rs. 258.80
B.Rs. 358.80
C.Rs. 458.80
D.Rs. 520.80
Answer: D.Rs. 520.80
Explanation: Explanation:
Area to be plastered = [2(l + b) Ã— h] + (l Ã— b)
= [2(25 + 12) Ã— 6] + (25 Ã— 12) = 744 sq m
Cost of plastering = 744 Ã— (70/100) = Rs.520.80 Answer: D
Question: The product of two consecutive odd no is -1, then what is the value of the sum of them.
A.-2
B.-1
C.0
D.1
Answer: C.0
Explanation: Two odd numbers are -1 and +1.
-1+1 =0
ANSWER:C
Question: In a certain animal shelter, the ratio of the number of dogs to the number of cats is 15 to 7. If 20 additional cats were to be taken in by the shelter, the ratio of the number of dogs to the number of cats would be 15 to 11. How many dogs are in the shelter?
A.75
B.25
C.30
D.45
Answer: A.75
Explanation: This ratio question can be solved in a couple of different ways. Here's an Algebraic approach...
We're told that the ratio of the number of dogs to the number of cats is 15:7. We're then told that 20 more cats are added to this group and the ratio becomes 15:11. We're asked for the number of dogs.
Algebraically, since the number of dogs is a multiple of 15 and the number of cats is a multiple of 7, we can write this initial relationship as...
15X/7X
When we add the 20 cats and factor in the 'ending ratio', we have an equation....
15X/(7X+20) = 15/11
Here we have 1 variable and 1 equation, so we can solve for X....
(15X)(11) = (7X+20)(15)
(X)(11) = (7X+20)(1)
11X = 7X + 20
4X = 20
X = 5
With this X, we can figure out the initial number of dogs and cats...
Initial dogs = 15X = 15(5) = 75
Final Answer: A
Question: An article is bought for Rs.675 and sold for Rs.900, find the gain percent?
A.33 1/7%
B.33 2/3%
C.33 1/3%
D.33 1/1%
Answer: C.33 1/3%
Explanation: 675 ---- 225
100 ---- ? => 33 1/3%
Answer: C
Question: How many three letter words are formed using the letters of the word KEYBOARD?
A.220
B.289
C.27
D.336
Answer: D.336
Explanation: Explanation:
The number of letters in the given word is EIGHT.
The number of three letter words that can be formed using these four letters is Ã¢Â´PÃ¢â€šÆ’ = 8*7*6 =336.
Answer: D
Question: The difference between the length and breadth of a rectangle is 25 m. If its perimeter is 210 m, then its area is:
A.1520 m2
B.2600 m2
C.2480 m2
D.2520 m2
Answer: B.2600 m2
Explanation: EXPLANATION
We have: (l â€“ b) = 25 and 2(l + b) = 210 or (l + b) = 105.
Solving the two equations, we get: l = 65 and b = 40.
Area = (l x b) = (65 x 40) m2 = 2600 m2.
Answer B
Question: Two trains each 250 m in length are running on the same parallel lines in opposite directions with the speed of 80 kmph and 70 kmph respectively. In what time will they cross each other completely?
A.32 sec
B.17 sec
C.12 sec
D.46 sec
Answer: C.12 sec
Explanation: D = 250 m + 250 m = 500 m
RS = 80 + 70 = 150 * 5/18 = 125/3
T = 500 * 3/125 = 12 sec
Answer:C
Question: The contents of a certain box consist of 72 apples and 30 oranges. How many oranges must be added to the box so that exactly 30% of the pieces of fruit in the box will be apples?
A.68
B.78
C.88
D.138
Answer: D.138
Explanation: apple = (apple + orange + x)*0.3
72 = (30 + 72 + x)*0.3
x = 138
Answer: D
Question: From given equation find the value of x: 2x² + 9x − 5
A.1/2
B.1
C.1 1/2
D.2/3
Answer: A.1/2
Explanation: That quadratic is factored as follows:
2x² + 9x − 5 = (2x − 1)(x + 5).
Lesson 17.
Now, it is easy to see that the second factor will be 0 when x = −5.
As for the value of x that will make
2x − 1 = 0,
we must solve that little equation. (Lesson 9.)
We have:
2x = 1
x = 1
2
The solutions are:
x = 1/2 or −5
A
Question: A bulk pack consists of 7 primary parts and 4 secondary parts. If a bundle is created with 4 primary parts and 2 secondary parts, in how many ways can the bundles be formed?
A.6
B.36
C.45
D.210
Answer: D.210
Explanation: Choose 4 primary parts from 7 primary parts and choose 2 secondary parts from 4 secondary parts:
4C7 * 2C4 = 35*6 = 210
Ans: D
Question: At a dinner party, 9 people are to be seated around a circular table. Two seating arrangement are considered different only when the positions of the people are different relative to each other. What is the total number of different possible seating arrangements for the group?
A.5
B.10
C.40320
D.3200
Answer: C.40320
Explanation: Has to be C.
Simple formula: There are (n - 1)! ways to arrange n distinct objects in a circle
hence (9-1)! = 8!= 40320
Question: 835, 734, 642, 751, 853, 981, 532
A.751
B.853
C.981
D.532
Answer: A.751
Explanation: Solution
In each number except 751,the difference of third and first digit is the middle one. Answer A
Question: if jacob sold a watch costing rs.400 to john at 15% profit and john sold the same to sudhir at 15% profit, what is the price paid by sudhir?
A.460
B.510
C.529
D.560
Answer: C.529
Explanation: John cp=1.15*400=460
sp of john=1.15*460=529
ANSWER:C
Question: A restaurant meal cost $60 and there was no tax. If the tip was more than 20 percent but less than 30 percent of the cost of the meal, then total amount paid must have been between:
A.$70 and $76
B.$73 and $78
C.$71 and $79
D.$68 and $75
Answer: C.$71 and $79
Explanation: let tip=t
meal cost=60
range of tip = from 20% of 60 to 30% of 60 = 12 to 18
hence range of amount paid= 60+T= 72 to 78 i.e. C
Question: Complete the below series
5,6,7,8,10,11,14, ?
A.12
B.13
C.14
D.15
Answer: D.15
Explanation: when we separate odd and even places the we get
5,7,10,14 and 6,8,11
difference between the first series is
2,3,4
difference between the second series is
2,3 so next number should be addition of 4 ie( 11+4=15)
the answer is 15
ANSWER:D
Question: 3-3*7+2=
A.A)2
B.B)-13
C.C)-18
D.D)-16
Answer: D.D)-16
Explanation: 3-3*7+2 = 5-21 = -16...
so the answer is -13... D
Question: Martha's Hair Saloon has recently lowered the prices of haircuts. If the decrease in the price of a haircut is 20% of the new price of a haircut, what is the approximate percent decrease in the price of a haircut at Martha's ?
A.15%
B.16.7%
C.20%
D.25%
Answer: B.16.7%
Explanation: Assume new price to be x.
decrease = 20% of the new price of a haircut = 0.2x
Hence, Old price = 1.2x
%decrease = 0.2x/1.2x = 1/6 = 16.67%
Answer :Option B
Question: In how many ways the letters of the word RAIXBON be arranged?
A.4367
B.5657
C.8756
D.5040
Answer: D.5040
Explanation: Total ways of arranging the letters = 7! = 5040 ways.
D)
Question: In an examination, 47% failed in English and 54% failed in Mathematics. Find the pass percentage in both the subjects if 31% failed in both the subjects?
A.900
B.277
C.287
D.255
Answer: A.900
Explanation: X * 4/5 * 80/100 = 576
X = 14400/16
X = 900
Answer: A
Question: A restaurant meal cost $33.50 and there was no tax. If the tip was more than 10 percent but less than 15 percent of the cost of the meal, then total amount paid must have been between:
A.$40 and $42
B.$39 and $41
C.$38 and 40
D.$37 and $39
Answer: D.$37 and $39
Explanation: let tip=t
meal cost=33.50
range of tip = from 10% of 33.5 to 15% of 33.5 = 3.55 to 5.325
hence range of amount paid= 33.5+T= 37.05 to 38.825
ANSWER:D
Question: The game of blackjack is played with a deck consisting of 13 cards (one of each of the numbers 2-10, one jack, one queen, one king, and one of ace) in each of four suits: clubs, diamonds, hearts, and spades.
In a game of blackjack, if your first card is a spade, what are the odds that it is a 10?
A.1/52
B.1/26
C.1/4
D.1/13
Answer: D.1/13
Explanation: The question should ask about the probability not the odds.
There are 13 spades, the probability that the spade we already have is a 10 is therefore 1/13.
Answer: D.
Question: Two trains of equal lengths are running at speeds of 30 kmph and 60 kmph. The two trains crossed each other in 30 seconds when travelling in opposite direction. In what time will they cross each other when travelling in the same direction?
A.90
B.88
C.66
D.55
Answer: A.90
Explanation: Let the length of each train be x m.
(x + x) / (60 + 30)5/18 = (750 * 18) / (30 * 5) = 90 sec.
Answer: A
Question: There are 40 students in a certain geometry class. If one half of the students are boys and three fourths of the boys are under six feet tall, how many boys in the class are under six feet tall?
A.6
B.12
C.15
D.24
Answer: C.15
Explanation: Total Students = 40
One half of the students are boys = 1/2*40 = 20
Three fourths of the boys are under six feet tall = 3/4*20 = 15 ...
Therefore Number of boys in the class under six feet tall = 15 ... Answer C....
Alternatively... Number of boys in the class under six feet tall = 3/4 of 1/2 of Total Students = 3/4*1/2*40 = 15...
Answer C
Question: In how many different number of ways 4 men and 2 women can sit on a shopa which can accommodate persons?
A.170
B.180
C.200
D.30
Answer: D.30
Explanation: Option 'D'
6p2 = 6 x 5 = 30