RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: Rahul went to a shop and bought things worth Rs. 30, out of which 30 Paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?
A.25.7
B.24.7
C.23.7
D.22.7
Answer: B.24.7
Explanation: Total cost of the items he purchased = Rs.30
Given that out of this Rs.30, 30 Paise is given as tax
=> Total tax incurred = 30 Paise = Rs.30/100
Let the cost of the tax free items = x
Given that tax rate = 6%
∴ (30−30/100−x)6/100 = 30/100
⇒ 6(30 −0.3 −x) = 30
⇒ (30− 0.3 − x) = 5
⇒ x = 30 − 0.3 − 5 = 24.7
B)
Question: Today is Wednesday. After 36 days, it will be :
A.Thursday
B.Saturday
C.Monday
D.Sunday
Answer: A.Thursday
Explanation: Each day of the week is repeated after 7 days.
So, after 35 days, it will be Wednesday.
After 36 days, it will be Thursday
Answer is A
Question: n May Mrs Lee's earnings were 60 percent of the Lee family's total income. In June Mrs Lee earned 20 percent more than in May. If the rest of the family's income was the same both months, then, in June, Mrs Lee's earnings were approximately what percent of the Lee family's total income ?
A.64%
B.68%
C.72%
D.76%
Answer: A.64%
Explanation: Let total earning be 100$ then Mrs. Lee earns 60$.
If this increased by 20% in June then Mrs.Lee new income is 72$, and the family income is 112$.
% of mrs lee = 72*100/112 = ~64%
ANSWER:A
Question: A man can row a boat at 20 kmph in still water. If the speed of the stream is 6 kmph, what is the time taken to row a distance of 60 km downstream?
A.30/20 hours
B.39/28 hours
C.30/32 hours
D.30/13 hours
Answer: D.30/13 hours
Explanation: Speed downstream = 20 + 6 = 26 kmph.
Time required to cover 60 km downstream
= d/s = 60/26 = 30/13 hours.
Answer:D
Question: A man rows down stream 32km and 14 km upstream. if he takes 6 hrs to covereach distance, then the velocity of the current is
A.1/2kmph
B.1.5kmph
C.1 3/2kmph
D.2kmph
Answer: B.1.5kmph
Explanation: Rate down stream=(32/6)kmph;
Rate up stream=(14/6)kmph;
velocity of the current =1/2(32/6-14/6)kmph
=1.5kmph
Answer(B)
Question: A large box contains 20 small boxes and each small box contains 25 chocolate bars. How many chocolate bars are in the large box?
A.250
B.500
C.450
D.550
Answer: B.500
Explanation: The number of chocolate bars is equal to
20 * 25 = 500
correct answer B
Question: The average of 9 numbers is 8 and the average of 7 other numbers is 6. What is the average of all 16 numbers?
A.9
B.8
C.7 1⁄8
D.7 1⁄2
Answer: C.7 1⁄8
Explanation: The average of 9 numbers is 8....
The sum of those numbers is (9)(8) = 72.
The average of 7 other numbers is 6....
The sum of those numbers is (7)(6) = 42
The sum of ALL 16 numbers is 72+42 = 114. The average of those numbers is 114/16 = 57/8 = 7 1/8.
Final Answer:
[Reveal]Spoiler:
C
Question: A trader sold an article on a certain price with 40% profit. If he sold double of previous selling price then find its profit %
A.140%
B.180%
C.120%
D.100%
Answer: B.180%
Explanation: let cost price = 100%
selling price = 140%
new s.p. = 280%
p% = 280-100 = 180%
Answer is B
Question: length =9 feet
breadth =37−9/2=14 feet
Area =9×14=126 square feet
A.126 sq. ft
B.156 sq. ft.
C.216 sq. ft.
D.145 sq. ft.
Answer: A.126 sq. ft
Explanation: A
126 sq. ft.
length =9 feet
breadth =37−9/2=14 feet
Area =9×14=126 square feet
Question: A certain shade of gray paint is obtained by mixing 3 parts of white paint with 5 parts of black paint. If 2 gallons of the mixture is needed and the individual colors can be purchased only in one gallon or half gallon cans, what is the least amount Q of paint, in gallons, that must be purchased in order to measure out the portions needed for the mixture?
A.2
B.2 1/2
C.3
D.3 1/2
Answer: B.2 1/2
Explanation: Given W:B = 3:5
That means say 3 gallons of white paint + 5 gallons of black paint = 8 gallons of paint mixture.
But we want least amount of whiteblack paints for minimum of 2 gallons of mixture, so lets reduce keeping same ratio,
1.5 : 2.5 gives 1.5 + 2.5 = 4 gallons of mixture, but we want only 2 gallons, lets further reduce
0.75: 1.25 gives 1+1.5 =2.5 gallons of mixture. This looks ok, but lets reduce further just to be sure
0.375: 0.625 gives 0.5 + 1 = 1.5 gallons of mixture, thats less than 2 gallons of mixture Q, so not acceptable.
So correct ans is 2.5 gallons. B
Question: The average of marks obtained by 120candidates was 35. If the avg of marks of passed candidates was 39 and that of failed candidates was 39 and that of failed candidates was 15, the no.of candidates who passed the examination is?
A.80
B.90
C.100
D.120
Answer: C.100
Explanation: Let the number of candidate who passed = y
Then, 39y + 15(120 - y) =120 x 35
⇒ 24y= 4200 -1800
∴ y= 2400 / 24 = 100
C
Question: Peter invests a sum of money and gets back an amount of $ 815 in 3 years . David invests an equal amount of money and gets an amount of $870 in 4 years. If both amounts were invested at the same rate (simple interest ) What was the sum of money invested ?
A.670
B.650
C.698
D.744
Answer: B.650
Explanation: Since both Peter and David invested the same amount of money at the same rate, they would earn same interest per year.
David invested for one year more than Peter and hence he got interest amount for one more year.
Interest earned per year = Amount received by David - Amount received by Peter = 870 - 815 = 55
Interest earned for 3 years = 55*3 = 165
Amount invested = 815 - 165=650
Answer: B
Question: A metallic sheet is of rectangular shape with dimensions 48 m x 36 m. From each of its corners, a square is cut off so as to make an open box. If the length of the square is 8 m, the volume of the box (in m cube) is:
A.4120 m cube
B.4140 m cube
C.5140 m cube
D.5120 m cube
Answer: D.5120 m cube
Explanation: Explanation:
l = (48 - 16)m = 32 m, [because 8+8 = 16]
b = (36 -16)m = 20 m,
h = 8 m.
Volume of the box = (32 x 20 x 8) m cube
= 5120 m cube.
Option D
Question: At what rate of CI per year will a sum of Rs. 1200 become Rs. 1348.32 in 2 years?
A.3%
B.6%
C.7%
D.8%
Answer: B.6%
Explanation: Let the rate be R% p.a.
Then, 1200 x 1 +	R 2	= 1348.32
100
1 +	R 2	=	134832	=	11236
100	120000	10000
1 +	R 2	= 106 2
100	100
1 +	R	=	106
100	100
R = 6%
B
Question: If (x - 1)(x - 2) = x^2 + x, what is a possible value of x?
A. 1/2
B. 2
C. -1
D. 1
Answer: B. 2
Explanation: Rearranging the given expression:
(x - 1)(x - 2) = x^2 + x
i.e. x^2 - 3x + 2 = x^2 + x
i.e. -4x = -2
i.e. x = -4/-2 = 2
Answer: Option B
Had it been a difficult expression to solve further, then we could have used options to check which on esatisfies the expression after solving it as further as possible
Question: 6, 11, 21, 36, 56, 81, 111, 146, 186, ?
A.511
B.711
C.811
D.231
Answer: D.231
Explanation: The pattern is + 5, + 10, + 15, + 20, + 25, + 30, + 35, + 40, + 45, + 50,....
Answer : D.
Question: How many ways are there for 4 males and 3 females to sit (around a circular table) if no male should sit next to a male (and no female next to female) and Mary wants to sit with her back on the wall?
A.48
B.12
C.72
D.100
Answer: A.48
Explanation: So Mary has her own chair, fixed position. Other two females around the table can sit in 2 ways: the first to the left of Mary and the second to the right or vise-versa. Now, if 4 males will sit between them then no two female or two male will sit next to each other (female-male-female-male-female-male). But these males on their spots can also sit in different ways, namely in 4! different ways, so total 2*4!=48.
Answer A.
Question: On Saturday morning, Malachi will begin a camping vacation and he will return home at the end of the first day on which it rains. If on the first three days of the vacation the probability of rain on each day is 0.4, what is the probability that Malachi will return home at the end of the day on the following Monday?
A.0.008
B.0.144
C.0.488
D.0.512
Answer: B.0.144
Explanation: Re-phrasing the question:
What is the probability of: Saturday: No rain, Sunday: No rain, Monday: Rain
Probablity of rain = 0.4
Therefore, probability of no rain = 0.6
0.6*0.6*0.4 = 0.144
Hence B
Question: If "YELLOW" is given a color code of 92, what is the difference between "BROWN" and "RED"?
A.40
B.52
C.119
D.45
Answer: D.45
Explanation: Case – Codes : A - 1, B - 2, C - 3, D - 4, E - 5, F - 6, G - 7, H - 8, I - 9, J - 10, K - 11, L - 12, M - 13, N - 14, O - 15, P - 16, Q - 17, R - 18, S - 19, T - 20, U - 21, V - 22, W - 23, X - 24, Y - 25, Z - 26
BROWN- 72
RED- 27
Answer: D
Question: What is the sum of the integers from -170 to 171, inclusive?
A.181
B.171
C.191
D.201
Answer: B.171
Explanation: in an arithmetic progression,
the nth term is given by tn=a+(n-1)d
here tn=171, a=-170, d=1
hence, 171=-170+(n-1)
or n=342
Sum of n terms can be calculated by sn=n/2(a+l)
a=first term, l=last term, n=no. of terms
sn=342*(-170+171)/2
sn=342*1/2
sn=171
Answer : B
Question: The interior surfaces of a children's room (including ceiling, floor and 4 faces) are to be painted by 6 different colors. In how many ways can be this be done?
A.A.720
B.B.256
C.C.1
D.D.12
Answer: A.A.720
Explanation: If I have to paint 6 faces with 6 different colour...
First face can have 6c1 options,
2nd would have 5c1, and subsequent ones would have 4c1, 3c1, 2c1 and 1 options respectively.
Total options = 6c1 X 5c1 x 4c1 x 3c1 x 2c1 x 1 = 720 distinct ways
Correct answer - A
Question: What is the difference between the biggest and the smallest fraction among 2/3 , 3/4 , 4/5 and 5/6?
A.1/6
B.1/12
C.1/20
D.1/30
Answer: A.1/6
Explanation: Explanation:
Converting each of the given fractions into decimal form, we get
Since 0.833>0.8>0.75>0.66
So,
Required Difference = 5/6-2/3=1/6
ANSWER IS A
Question: The ratio of the length and the breadth of a rectangle is 4 : 3 and the area of the rectangle is 6912 sq cm. Find the ratio of the breadth and the area of the rectangle?
A.1:96
B.1:98
C.1:26
D.1:97
Answer: A.1:96
Explanation: Let the length and the breadth of the rectangle be 4x cm and 3x respectively.
(4x)(3x) = 6912
12x2 = 6912
x2 = 576 = 4 * 144 = 22 * 122 (x > 0)
=> x = 2 * 12 = 24
Ratio of the breadth and the areas = 3x : 12x2 = 1 : 4x = 1: 96.
Answer:A
Question: An alloy of copper and zinc contains copper and zinc in the ratio 6 : 4. Another alloy of copper and zinc contains copper and zinc in the ratio 3 : 7. In what ratio should the two alloys be mixed so that the resultant alloy contains equal proportions of copper and zinc?
A.12 : 1
B.1 : 2
C.4 : 1
D.2 : 5
Answer: B.1 : 2
Explanation: Let Alloy_1 be x units, and let Alloy_2 be y units.
So, fraction of copper in Alloy_1 = 6x/10, and fraction of zinc in Alloy_1 = 4x/10
Similarly, fraction of copper in Alloy_2 = 3y/10, and fraction of zinc in Alloy_2 = 7y/10.
Mixing them, we get
copper = 6x/10 +3y/10; zinc = 4x/10 + 7y/10
So, 6x+3y = 4x+7y
-> 2x = 4y
-> x/y =2/4 = 1/2
So, they must be mixed in the ratio 1 : 2
Answer : B
Question: A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that atleast one bulb is good?
A.125/128
B.125/178
C.125/126
D.125/129
Answer: C.125/126
Explanation: Required probability
= 1 - 1/126
= 125/126
Answer: C
Question: The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling alongthe oundary of the park at the speed of 12 km/hr completes one round in 8 min, then the area of the park (in sq. m) is?
A.7889890 m
B.2334356 m
C.1536001 m
D.1232431 m
Answer: C.1536001 m
Explanation: Perimeter = Distance covered in 8 min. = 12000 x 8 m = 1600 m.
60
Let length = 3x metres and breadth = 2x metres.
Then, 2(3x + 2x) = 1600 or x = 160.
Length = 480 m and Breadth = 320 m.
Area = (480 x 320) m2 = 153600 m
C
Question: The average of seven numbers is 18. The average of first three numbers is 12 and the average of last three numbers is 19. What is the middle number?
A.25
B.27
C.29
D.33
Answer: D.33
Explanation: The total of seven numbers = 7X18 = 126
The total of first 3 and last 3 numbers is = 3 X 12+3 X 19 = 99
So, the middle number is (126 - 93 ) = 33
D
Question: A man saves 20% of his monthly salary. If an account of dearness of things he is to increase his monthly expenses by 20%, he is only able to save Rs. 240 per month. What is his monthly salary?
A.5000
B.2999
C.6000
D.2990
Answer: C.6000
Explanation: Income = Rs. 100
Expenditure = Rs. 80
Savings = Rs. 20
Present Expenditure 80*(20/100) = Rs. 96
Present Savings = 100 â€“ 96 =Rs. 4
100 ------ 4
? --------- 240 => 6000
Answer: C
Question: Eric, Nick and Archi make contributions to the Society Of Nature Protection in the ratio of 5:3:2.5. If altogether they contribute 2688 Nis, how much more money does Nick contribute than Archi?
A.128 Nis
B.212 Nis
C.234 Nis
D.245 Nis
Answer: A.128 Nis
Explanation: E:N:A 5:3:2.5
so total = 5x + 3x + 2.5 x = 10.5 x = 2688
so x = 256
Nick Contribution is 0.5 more than Archi so 0.5 x =0.5 * 256 = 128
So A. 128 Nis is the correct answer
Question: A die is thrown twice and the sum of the numbers appearing is observed to be 6.
find the conditional probability that the number 4 has appeared at least once?
A.1/5
B.1/7
C.1/9
D.2/5
Answer: D.2/5
Explanation: Let E be the event that ‘number 4 appears at least once’ and F be
the event
that ‘the sum of the numbers appearing is 6’.
Then, E = {(4,1), (4,2), (4,3), (4,4), (4,5), (4,6), (1,4), (2,4), (3,4),
(5,4), (6,4)}
and F = {(1,5), (2,4), (3,3), (4,2), (5,1)}
We have P(E) = 11/36
and P (F) = 5/36
Also EnF = {(2,4), (4,2)}
Therefore P(EnF) = 2/36
the required probability
P(E|F) = P(EnF)/P(F) = (2/36)/(5/36) = 2/5.
D)
Question: Two pipes A and B can fill a cistern in 12 and 15 minutes respectively. Both are opened together but after 3 minutes A is turned off. After how much more time will the cistern be filled?
A.8 1/5
B.8 1/9
C.8 1/4
D.8 1/2
Answer: C.8 1/4
Explanation: 3/12 + (3 + x)/15 = 1
x = 8 1/4
Answer:C
Question: A man is 26 years older than his son. In two years, his age will be twice the age of his son. The present age of this son is
A.21 years
B.22 years
C.23 years
D.24 years
Answer: D.24 years
Explanation: Explanation:
Let's Son age is x, then Father age is x+26.
=> 2(x+2) = (x+26+2)
=> 2x+4 = x+28
=> x = 24 years
Option D
Question: What is the sum of the greatest common factor and the lowest common multiple of 12 and 16?
A.19
B.22
C.52
D.36
Answer: C.52
Explanation: Prime factorization of the given numbers
12= 2^2 * 3
48= 2^4 *3
Greatest common factor = 4
Lowest common multiple =48
Sum = 4+ 48 = 52
Answer C
Question: The average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is?
A.19 years
B.54 years
C.16 years
D.15 years
Answer: A.19 years
Explanation: Sum of the present ages of husband, wife and child
= (23 * 2 + 5 * 2) = 57 years.
Required average
= 57/3
= 19 years.
Answer:A
Question: If fy > 0 and yz < 0, which of the following must be negative:
A.fyz
B.fy(z^2)
C.f(y^2)z
D.x(y^2)(z^2)
Answer: C.f(y^2)z
Explanation: fy > 0 means that fy is positive.
yz < 0 means that yz is negative.
f(y^2)z = (fy)(yz) = positive*negative = negative. Thus option C is always negative.
Question: The difference between the place values of two eights in the numerical 38140482 is
A.7999920
B.799920
C.7920
D.79920
Answer: A.7999920
Explanation: Required difference = (8000000-80)
=7999920.
Answer is A
Question: A policeman noticed a criminal from a distance of 200 km. The criminal starts running and the policeman chases him. The criminal and the policeman run at the rate of 8 km and 9 km per hour respectively. What is the distance between them after 3 minutes ?
A.100 m
B.120 m
C.130 m
D.150 m
Answer: D.150 m
Explanation: Explanation :
Solution: Relative speed = (9 - 8) = 1 km/hr.
Distance covered in 3 minutes = (1 * 3/60) km = 1/20 km = 50 m.
.'. Distance between the criminal and policeman = (200 - 50) m = 150 m.
Answer : D
Question: What is the average of 1200, 1300, 1400, 1510, 1520, 1530, and 1200?
A.1360.47
B.1355.8
C.1380
D.1350
Answer: C.1380
Explanation: Add 1200, 1300, 1400, 1510, 1520, 1530, and 1200
Grouping numbers together may quicken the addition
sum = 9660
9660/7 =1380
C
Question: A jogger running at 9 km/hr along side a railway track is 250 m ahead of the engine of a 100 m long train running at 99 km/hr in the same direction. In how much time will the train pass the jogger?
A.14 sec
B.67 sec
C.98 sec
D.36 sec
Answer: A.14 sec
Explanation: Speed of train relative to jogger =99 - 9 = 90 km/hr.
= 90 * 5/18 = 25 m/sec.
Distance to be covered = 250 + 100 = 350 m.
Time taken = 350/25 =14 sec.
Answer:A
Question: In a Government institute 20 Nos. staffs are employed. In a Festival season their Boss give festival allowance to all. He says his accountant to calculate for 30 days @ 100. Also he says balance payment will give to driver and cleaning staff and to be adjust from petty cash. He had given Rs.65000/- to the accountant. How much amount will taken from Petty cash?
A.A)1000
B.B)3000
C.C)3500
D.D)2500
Answer: A.A)1000
Explanation: For 20 staffs: 300*100*20 = 60000
for driver and cleaning staff: 300*100*2 =6000
From petty Cash : 1000
Answer is A
Question: If money is invested at r percent interest, compounded annually, the amount of the investment will double in approximately 50/r years. If Luke's parents invested $14,500 in a long term bond that pays 12 percent interest compounded annually, what will be the approximate total amount of the investment 12 years later, when Luke is ready for college?
A.62,000
B.85,500
C.95,500
D.120,500
Answer: D.120,500
Explanation: Answer equals D in 48 years. I thought by 50th year it would reach 120,500. Options should have been separated more widely for clarity.
Question: Can you find the largest possible number containing any 9 of the 10 digits. considering 0 also as a number that is divisible by 11, without a remainder?
A.677652413
B.827652413
C.997652413
D.987652413
Answer: D.987652413
Explanation: D
987652413
With some trial one will find 987652413 as the highest possible number containg 9 of the 10 digits that is divisible by 11, without a remainder
Question: There are 840 male and female participants in a meeting. Half the female participants and one-quarterof the male participants are Democrats. One-third of all the participants are Democrats. How many of the Democrats are female?
A.75
B.100
C.125
D.140
Answer: D.140
Explanation: Let m be the number of male participants and f be the number of female articipants in the meeting. Thetotal number of participants is given as 840.
Hence, we have m+f= 840
Now, we have that half the female participants and one-quarter of the male participants are Democrats.
Let d equal the number of the Democrats.
Then we have the equation f/2 + m/4 =d
Now, we have that one-third of the total participants are Democrats. Hence, we have the equation
d = 840/3 = 280
Solving the three equations yields the solution
f = 280,m= 560, and d= 280.
The number of female democratic participants equals half the female participants equals
280/2 = 140.
ANSWER:D
Question: If a^2bc = b^3 , which of the following must be true?
I. ac = b^2
II. b = 0
III. ac = 1
A.I
B.none
C.II
D.III
Answer: B.none
Explanation: B
Question: Average age of students of an adult school is 52 years. 120 new students whose average age is 32 years joined the school. As a result the average age is decreased by 4 years. Find the number of students of the school after joining of the new students.
A.1200
B.150
C.360
D.240
Answer: B.150
Explanation: Explanation :
Let the original no. of students be x.
According to situation, 52x + 120*32 = (x + 120)36 ⇒ x = 30
So, Required no. of students after joining the new students
= x + 120 = 150
Answer : B
Question: The arithmetic mean of the set S = {4, K, 3, 9, M, 4} is 5. If K and M are integers, and K ≠ M, what is the median of the numbers in the set?
A.3
B.3.5
C.4
D.4.5
Answer: C.4
Explanation: The sum of the numbers is 6*5 = 30
K+M = 30 - 9 - 4 - 4 - 3 = 10
Since K ≠ M, K and M do not equal 5.
Thus one of the two numbers is 4 or less and one is 6 or more.
Then middle two numbers in the set are 4 and 4.
The median is 4.
The answer is C.
Question: By investing Rs. 1620 in 8% stock, Michael earns Rs. 135. The stock is then quoted at:
A.Rs. 80
B.Rs. 96
C.Rs. 106
D.Rs. 108
Answer: B.Rs. 96
Explanation: Michel earns Rs 135 by investing Rs1620
To earn Rs 8 how much he have to invest?
=(8*1620)/135=Rs 96
ANSWER:B
Question: A man buys a cycle for Rs. 1200 and sells it at a loss of 15%. What is the selling price of the cycle?
A.s. 1020
B.s. 1160
C.s. 1190
D.s. 1202
Answer: A.s. 1020
Explanation: S.P. = 85% of Rs. 1200 = Rs.85/100x 1200	= Rs. 1020
ANSWER :A
Question: Find the area of the quadrilateral of one of its diagonals is 20 cm and its off sets 9 cm and 6 cm?
A.120 sq m
B.150 sq m
C.110 sq m
D.300 sq m
Answer: B.150 sq m
Explanation: 1/2 * 20(9 + 6) = 150 cm2
ANSWER:B
Question: The average (arithmetic mean) of the 5 positive integers k, m, r, s, and t is 12, and k < m < r < s < t. If t is 20, what is the greatest possible value of the median of the 5 integers?
A.16
B.18
C.19
D.20
Answer: D.20
Explanation: We need to find the median which is the third value when the numbers are in increasing order. Since k<m<r<s<t, the median would be r.
The average of the positive integers is 12 which means that in effect, all numbers are equal to 12. If the largest number is 20, it is 8 more than 12. We need r to be maximum so k and m should be as small as possible to get the average of 12. Since all the numbers are positive integers, k and m cannot be less than 1 and 2 respectively. 1 is 11 less than 12 and 2 is 10 less than 12 which means k and m combined are 21 less than the average. 20 is already 8 more than 12 and hence we only have 21 - 8 =13 extra to distribute between r and s. Since s must be greater than r, r can be 12+6 = 18 and s can be 12+7 = 19.
So r is 18.
Answer (D)
Question: A particular library has 150 books in a special collection, all of which were in the library at the beginning of the month. These book are occasionally loaned out through an inter-library program. If, by the end of the month, 65 percent of books that were loaned out are returned and there are 122 books in the special collection at that time, how many books of the special collection were loaned out during that month?
A.40
B.60
C.80
D.100
Answer: C.80
Explanation: The total number of books is 150.
Let x be the number of books which were loaned out.
65% of books that were loaned out are returned.
35% of books that were loaned out are NOT returned.
Now, there are 122 books, thus the number of un-returned books is 150-122 = 28 books.
0.35x = 28
x = 80
The answer is C.
Question: Of the 65 house in a development, 50 have a two-car garage, 40 have an in-the-ground swimming pool, and 35 have both a two-car garage and an in-the-ground swimming pool. How many houses in the development have neither a two-car garage nor an in-the-ground swimming pool?
A.10
B.15
C.20
D.25
Answer: A.10
Explanation: Neither Car nor Garage
= Total - Garage - (Swim - Common)
= 65 - 50 - (40-35) = 65-55 = 10
Answer A
Question: Solve: 12.05*5.4+0.6
A.108.45
B.110.45
C.106.45
D.109.45
Answer: A.108.45
Explanation: = 12.05*(5.4/0.6) = (12.05*9) = 108.45
Answer is A.
Question: If a cistern has 3 pipes of 1 cm , 4/3 cm and 2 cm thickness ...where the pipe with 2 cm thickness can fill the cistern in 2 hrs and 2 min..then in how much time they can fill the tank?
A.53.7min
B.54.7min
C.55.7min
D.56.7min
Answer: D.56.7min
Explanation: 2cm can fill in 122min
thickness inversly propotional to time
total thickness of the pipe=1+4/3+2=4.3
we know that 2cm can fill in 122min
for 4.3cm time =56.7min
ANSWER:D
Question: A certain purse contains 30 coins, Each coin is either a nickel or a quarter. If the total value of all coins in the purse is 4.70$, how many nickels does the purse contain?
A.12
B.14
C.16
D.20
Answer: B.14
Explanation: I picked a starting point and then kept ballparking until i hit the right answer
$4.70 - 6 quarters = $3.20. this would be 6 quarters and 64 nickels, WAY more than 30 so we need a lot more quarters
$4.70 - 16 quarters = $0.70 this would be 16 quarters and 14 nickels, 30 coins!
14 nickels! ANS=B