RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: A large delicatessen purchased p pounds of cheese for c dollars per pound. If d pounds of the cheese had to be discarded due to spoilage and the delicatessen sold the rest for S dollars per pound, which of the following represents the gross profit on the sale of the purchase? (gross profitequalssales revenueminusproduct cost)
A.(p − d)(s − c)
B.s(p − d) − pc
C.c(p − d) − ds
D.S(p-d) - cp
Answer: D.S(p-d) - cp
Explanation: Total cost price = c*p ............... (1)
Wastage = d pounds
Quantity sold = p-d
Selling price per pound = S
Total selling price = S(p-d) ........... (2)
Profit = (2) - (1)
= S(p-d) - cp
D
Question: What is the rate percent when the simple interest on Rs.1200 amount to Rs.400 in 4 Years?
A.8.33%
B.6%
C.2%
D.95%
Answer: A.8.33%
Explanation: Interest for 4yrs = 400
Interest for 1yr = 100
Interest rate = 100/1200 x 100 = 8.33%
Answer : A
Question: If a and b are different positive integers and b(a + b) = a(a + b), then which of the following must be true?
I. a = 1
II. b = 1
III. a < b
A.I only
B.II only
C.III only
D.I and II
Answer: D.I and II
Explanation: Number picking might not be the best way to solve MUST BE TRUE questions.
The question asks which of the followingMUSTbe true, or which of the following isALWAYStrue no matter what set of numbers you choose. For such kind of questionsif you can prove that a statement is NOT truefor one particular set of numbers, it will mean that this statement is not always true and hence not a correct answer.
So the set you chose just proves that II is not always true and hence it's not a part of a correct choice. As for I and III: they might be true for this particular set of numbers but not true for another set, so you can not say that I and III are always true just based on one set of numbers (it just happens to be that I and III are always true).
As forCOULD BE TRUEquestions:
The questions asking which of the followingCOULDbe true are different:if you can prove that a statement is truefor one particular set of numbers, it will mean that this statement could be true and hence is a correct answer
D.
Question: Ramesh can complete a work in 12 days, working 7 hours a day. Suresh can complete the same work in 8 days, working 9 hours a day. If Ramesh and Suresh work together working 7 hours a day, in how many days can they complete the work?
A.5 * 7 / 13
B.5 * 7 / 19
C.5 * 7 / 11
D.5 * 7 / 19
Answer: A.5 * 7 / 13
Explanation: Explanation:
Ramesh can finish the work in 12 * 7 = 84 hours
Amount of work he can complete in 1 hour = 1/84
Suresh can finish the same work in 8 * 9 = 72 hours
Amount of work he can complete in 1 hour = 1/72 hours
Work done by both of them in 1 hour =
= 1/84 + 1/72 = 13/504
Ramesh and Suresh together can complete the work in 504/13 hours.
i.e. 504/13 * 1/7 = 72/13 days
i.e. 5 * 7 / 13 days
ANSWER: A
Question: A train 250 m long is running at a speed of 68 kmph. How long does it take to pass a man who is running at 8 kmph in the same direction as the train?
A.5 sec
B.9 sec
C.12 sec
D.15 sec
Answer: D.15 sec
Explanation: Speed of the train relative to man = (68 - 8) kmph
= (60* 5/18) m/sec = (50/3)m/sec
Time taken by the train to cross the man
= Time taken by It to cover 250 m at 50/3 m / sec
= 250 *3/ 50 sec = 15sec
Answer : D
Question: If x, 3, 5, 7 are there and the range and median of them are the same, what is the value of x?
A.0
B.1
C.2
D.5
Answer: D.5
Explanation: Try taking the values of x as you suggested and then see if the median and the range are equal.
Once you do that, you will get the answer yourself.
Tried substituting values starting with 3, 5, 7...
only x = 5 satisfies the condition.
D
Question: The average of first six prime numbers which are between 40 and 80 is
A.35.4
B.50.7
C.45.7
D.57
Answer: B.50.7
Explanation: Explanation :
first six prime numbers which are between 40 and 80 = 41, 43, 47, 53, 59, 61
average = (41 + 43 + 47 + 53 + 59 + 61)/6
= 50.7
Answer : B
Question: Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?
A.17 1/7 days
B.17 1/8 days
C.17 5/7 days
D.17 3/7 days
Answer: A.17 1/7 days
Explanation: 1/30 + 1/40 = 7/120
120/7 = 17 1/7 days
Answer: A
Question: Determine the value of 62/54 divided by 62/54
A.0
B.1
C.2
D.3
Answer: B.1
Explanation: Solution:
Each number divided by itself equals 1.
Answer B
Question: A and B are two partially filled buckets of water. If 6 liters are transferred from A to B, then A would contain one-third of the amount of water in B. Alternatively, if 6 liters are transferred from B to A, B would contain one-half of the amount of water in A. Bucket A contains how many liters of water?
A.66/5
B.13
C.17
D.21
Answer: A.66/5
Explanation: Let Bucket A be A and Bucket B be B
Scenario 1
A-6 = 1/3 (B+6) ----> 3A-18 =B+6
Scenario 2
B-6 = 1/2 (A+6) -----> 2B-12 = A+6
From Scenario 1, B = 3A-24
Substitute B with this information in Stmt 2
2 (3A-24) -12 = A+6 ------> 6A -48-12 = A+6 ------> 6A- A = 60+6 ---> 5A= 66
A= 66/5, Answer choice A
Question: With both valves open, the pool will be filled with water in 48 minutes. The first valve alone would fill the pool in 2 hours. If the second valve emits 50 cubic meters of water more than the first every minute, then what is the capacity W of the pool?
A.9000 cubic meters
B.10500 cubic meters
C.11750 cubic meters
D.12000 cubic meters
Answer: D.12000 cubic meters
Explanation: D. 12000 cubic meters.
If both hte valves fill the pool in 48 minutes and valve 1 only fills in 120 minutes then valve 2 alone will fill the pool in (48*120)/(120-48) = 80 minutes.
Now, if valve 1 admits x cubic meter of water per minute then the capacity of pool will be 120x and also 80 (x+50).
or, 120x = 80 (x + 50).
or x = 100.
Hence, the capacity of pool = 120x = 12000 cubic meters.
Question: What is the smallest number which when diminished by 20, is divisible 15, 30, 45 and 60?
A.200
B.220
C.240
D.322
Answer: A.200
Explanation: Required Number
= (LCM of 15, 30, 45 and 60) + 20
= 180 + 20 = 200
Option A
Question: A train running at the speed of 54 km/hr crosses a pole in 9 sec. What is the length of the train?
A.135 m
B.786 m
C.566 m
D.546 m
Answer: A.135 m
Explanation: Speed = 54 * 5/18 = 15 m/sec
Length of the train = speed * time = 15 * 9
= 135 m
Answer: A
Question: r=2^(n+2), then in terms of r, 9^n=
A.r^2/81
B.r^2/16
C.r^2
D.r/3
Answer: B.r^2/16
Explanation: Questions in terms of variables can be easily solved by plugging in some values: Say n = 0
r = 2^2 = 4
and you need the value of 4^n which is 4^0 = 1
So when you put r = 4 in the options, you should get 1. Only option (A) satisfies.
Answer (B)
Question: The dimensions of a room are 25 feet * 15 feet * 12 feet. What is the cost of white washing the four walls of the room at Rs. 4 per square feet if there is one door of dimensions 6 feet * 3 feet and three windows of dimensions 4 feet * 3 feet each?
A.s.3624
B.s.4518
C.s.4518
D.s.4530
Answer: A.s.3624
Explanation: Area of the four walls = 2h(l + b)
Since there are doors and windows, area of the walls = 2 * 12 (15 + 25) - (6 * 3) - 3(4 * 3) = 906 sq.ft.
Total cost = 906 * 4 = Rs.3624
Answer: A
Question: In a Question paper there are 6 multiple choice questions. Each question has 3 choices with only one choice as the correct answer. What is the total number of ways in which a candidate will not get all the four answers correct?
A.19
B.85
C.748
D.624
Answer: D.624
Explanation: A candidate can answer the test in 3^6 number of ways (each question has 3 choices and we have total of 6 questions). Now, out of these cases there will be only one case when the candidate answered all the six questions correct. Therefore the total number of ways in which a candidate will NOT get all the six answers correct is 3^6-1=748.
Answer: C.
Question: Nine children — A, B, C, D, E, F, G, H and I — are going to sit in nine chairs in a row. The children C & F have to sit next to each other, and the others can sit in any order in any remaining chairs. How many possible configurations are there for the children?
A.600
B.720
C.80640
D.84320
Answer: C.80640
Explanation: for such questions , we can treat both as one then total person=8..
these 8 can be arranged in 8! ways.. but within these 8 , one consists of two people who can be arranged in 2 ways CF or FC.. so ans =8!*2=80640
ans C
Question: A train covers a distance of 12 km in 10 min. If it takes 10 sec to pass a telegraph post, then the length of the train is?
A.100
B.110
C.200
D.130
Answer: C.200
Explanation: Speed = (12/10 * 60) km/hr = (72 * 5/18) m/sec = 20 m/sec.
Length of the train = 20 * 10 = 200 m.
Answer: Option C
Question: A rectangular lawn of length 200m by 120m has two roads running along its center, one along the length and the other along the width. If the width of the roads is 5m what is the area Q covered by the two roads?
A.400
B.1550
C.1575
D.1600
Answer: C.1575
Explanation: Area Covered by Road Along the Length = 5*200 = 1000 Square Meter
Area Covered by Road Along the Width = 5*120 = 600 Square Meter
Common Area in both Roads (where the roads intersect) = Square with Side 5 meter = 5*5 = 25
Total Area of the Roads Q= 1000+600-25 = 1575
Answer: option C
Question: One year ago, Mrs Promila was four times as old as her daughter Swati. Six year hence,Mrs. Promila’s age will exceed her daughter’s age by 9 years. The ratio of the present ages of Promila and her daughter is
A.9:2
B.11:3
C.12:5
D.13:4
Answer: D.13:4
Explanation: Let Swati’s age 1 year ago = x
Then Promila’s age 1 year ago = 4x
Then, (4x + 6) - (x + 6) = 9
=> 3x = 9
=>x = 3
Present age of Promila
= (12 + 1) years =13 years
Present age of Swati
=(3 + 1)years
= 4 years
Thus, Ratio of their ages
= 13:4
ANSWER:D
Question: If abc^2 = b^3 , which of the following must be true?
I. ac = b^2
II. b = 0
III. ac = 1
A.I
B.II
C.none
D.III
Answer: C.none
Explanation: C
Question: A metallic sphere of radius 12 cm is melted and drawn into a wire, whose radius of cross section is 8 cm. What is the length of the wire?
A.16 cm
B.24 cm
C.28 cm
D.36 cm
Answer: D.36 cm
Explanation: Volume of the wire (in Cylindrical shape) is equal to the volume of the sphere.
π(8)^2 * h = (4/3)π (12)^3 => h
= 36 cm
Answer:D
Question: A man rows his boat 90 km downstream and 70 km upstream, taking 3 hours each time. Find the speed of the stream?
A.76 kmph
B.6 kmph
C.3.5 kmph
D.4.5 kmph
Answer: C.3.5 kmph
Explanation: Speed downstream = d/t = 90/(3)
= 30 kmph
Speed upstream = d/t = 70/(3)
= 23 kmph
The speed of the stream = (30 - 23)/2
= 3.5 kmph
Answer:C
Question: Claire has a total of 86 pets consisting of gerbils and hamsters only. One-quarter of the gerbils are male, and one-third of the hamsters are male. If there are 25 males altogether, how many gerbils does Claire have?
A.39
B.50
C.60
D.54
Answer: D.54
Explanation: G+H =86 ...1 ; G/4 +H/3 =25 ....2 OR 3G +4H =25*12 =300
G =86-H OR 3(86-H) +4H =300 H = 300-258 =42 THEN G= 96-42 =54
D
Question: How many E ways are there of placing 6 marbles in 4 bowls, if any number of them can be placed in each bowl?
A.6C4
B.6P4
C.4^6
D.6^4
Answer: C.4^6
Explanation: Each marble has 4 options, so there are total of E=4*4*4*4*4*4=4^6 ways.
Answer: C.
The total number of ways of dividing n identical items among r persons, each one of whom, can receive 0,1,2 or more items is (n+r -1)C(r-1).
Question: The floor of a rectangular room is 19 m long and 12 m wide. The room is surrounded by a veranda of width 2 m on all its sides. The area of the veranda is :
A.144 m2
B.140 m2
C.108 m2
D.158 m2
Answer: B.140 m2
Explanation: Area of the outer rectangle = 23 Ã— 16 = 368 m2
Area of the inner rectangle = 19 Ã— 12 = 228 m2
Required area = (368 â€“ 228) = 140 m2
Answer B
Question: When a certain number X is divided by 143, the remainder is 21. Which of the following numbers, if added to X, would result in a number divisible by 13?
A.7
B.21
C.5
D.47
Answer: C.5
Explanation: Now X= 143q + 45 = 11*13*q + 21..so we have to make only 21 div by 13..
21 + 5 = 26 divisible by 13 , add 5
ans C
Question: √(25)^2
A.5
B.14
C.25
D.21
Answer: C.25
Explanation: explanation
√(25)^2=?
or, ? = 25
Answer C
Question: In how many ways E can the crew of a ten oared boat be arranged ,when of the ten persons available, 2 of whom can row only on the bow side and 3 of whom can row only on the stroke side?
A.1. 10!/(2! * 3!)
B.2. 10!/(8! * 7!)
C.3. 5!/(3! * 2!)
D.4. (5!)^3/(3! * 2!)
Answer: D.4. (5!)^3/(3! * 2!)
Explanation: Ans is D.
Going by the assumtion that both the Bow side and Stroke side will have 5 person each.
Five(3+2) of them had allready been selected(according to their preference), so from the remaining 5 we have to select 2 for the stroke side or 3 for the bow side.
and the 5 crew of each side can be arranged in 5! ways.E
Hence answer is 5C3 * 5! * 5!= (5!)^3/ 3!2!.D
Question: A property decreases in value every year at the rate of 6 1/4% of its value at the beginning of the year its value at the end of 3 years was Rs.21093. Find its value at the beginning of the first year?
A.21093
B.26667
C.26888
D.2668
Answer: A.21093
Explanation: 6 1/4% = 1/16
x *15/16 * 15/16 * 15/16 = 21093
x = 25600.24
Answer: A
Question: How many odd integers between 100 and 300 are there such that their tens digit is even?
A.100
B.200
C.300
D.50
Answer: D.50
Explanation: I guess the easier way to do this would be.
200 numbers between - 100 and 300
Out of which half would be even, half odd.
Number of odd = 100. Of this.. the one with even tenth digit would be half again. hence 50.
correct option is D
Question: If each participant of a chess tournament plays exactly one game with each of the remaining participants, then 210 games will be played during the tournament. What is the number of participants?
A.18
B.19
C.20
D.21
Answer: D.21
Explanation: Let n be the number of participants.
The number of games is nC2 = n*(n-1) / 2 = 210
n*(n-1) = 420 = 21*20 (trial and error)
The answer is D.
Question: A polling company found that, of 300 households surveyed, 120 spent at least $100 per month on both gasoline and electricity, 60 spent at least $100 per month on gasoline but not on electricity, and for every household that did not spend at least $100 per month on gasoline or electricity, 4 spent at least $100 per month on electricity but not on gasoline. How many of the 300 households did not spend at least $100 per month on either gasoline or electricity?
A. 24
B. 30
C. 36
D. 90
Answer: A. 24
Explanation: For every household that did not spend at least $100 per month on gasoline or electricity = P ,
4 spent at least $100 per month on electricity but not on gasoline = 4P
Spent = 300 - P
again spent = 60+120+4P
Now,
300 - P = 60+120+4P
or, 5P = 120
or, P = 24 (Answer)
Question: The H.C.F. of two numbers is 20 and the other two factors of their L.C.M. are 11 and 15. The larger of the two numbers is:
A.276
B.300
C.299
D.322
Answer: B.300
Explanation: the numbers are (20 x 11) and (20 x 15).
Larger number = (20 x 15) = 300.
ANSWER :B
Question: What is the remainder when 1201 × 1202 ×1205 × 1207 is divided by 6?
A.1
B.2
C.3
D.4
Answer: D.4
Explanation: The remainders when dividing each number by six are: 1, 2, 5, and 1.
The product is 1*2*5*1 = 10
The remainder when dividing 10 by 6 is 4.
The answer is D.
Question: With what number must 3.475817 be multiplied in order to obtain the number 34,758.17?
A.100
B.1,000
C.10,000
D.100,000
Answer: C.10,000
Explanation: Explanation: The decimal must be moved four places to the right. To do this, we must multiply by a number with four zeroes. The correct answer is 10,000.The decimal must be moved four places to the right. To do this, we must multiply by a number with four zeroes. The correct answer is 10,000.
Answer : (C)
Question: The work done by a man, a woman and a child is in the ratio of 3:2:1. There are 20 men, 30 women & 48 children in a factory. Their weekly wages amount to Rs.840, which is divided in the ratio of work done by the men, women and children. What will be the wages of 15 men, 21 women & 30 children for 2 weeks?
A.Rs.1100
B.Rs.1120
C.Rs.1170
D.Rs.1190
Answer: C.Rs.1170
Explanation: sax Ratio of wages of 20 men, 30 women
and 45 chﬂdren perweek
: (3 x 2o):(2 x 30) (1 x 43) 5
Total wages or 20 men per week
= R5 300
Therefore, wages of a man per week : Rs 15,
sirmlarly, wages of woman per week
: Rs 10 and wages ofchwld perweek Rs 5
Total wages of (15 men, 21 women and 30
chﬂdrenj perweek
= 15x15 + 21x10 + 30x5 = 585
Total wages for 2 weeks = Rs.1170
C
Question: A company has two types of machines, type R and type S. Operating at a constant rate, a machine of type R does a certain job in 36 hrs and a machine of type S does the same job in 18 hours. If the company used the same number of each type of machine to do the job in 6 hours, how many machines of type R were used?
A.2
B.4
C.6
D.9
Answer: A.2
Explanation: Rate of machine R =1/36
Rate of machine S =1/18
since same no of machines used for R and S to do the same work in 6 hrs
So collective rate needed to finish the work in 6 hrs= 1/6
Let the no of machine be x
So, x/36 +x/18 =1/6
x3/36=1/6
x=2
So no of machine R is 2
Answer A
Question: In a group of people, if 30 people were made to stand in each column, 16 columns could be formed. If 40 people were made to stand in a column, how many columns could be formed?
A.12
B.14
C.16
D.18
Answer: A.12
Explanation: 16*30 = 40*n
n = 12
The answer is A.
Question: A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of Rs. 343, what was his profit?
A.s. 63
B.s. 69
C.s.72
D.s.75
Answer: A.s. 63
Explanation: C.P. = Rs. (100/122.5)x343
= Rs. (1000/1225)x343
= Rs. 280
Profit = Rs. (343 - 280) = Rs. 63.
Answer:A
Question: 3 candidates in an election and received 1136, 7636 and 10628 votes respectively. What % of the total votes did the winning candidate gotin that election?
A.40%
B.55%
C.54.8%
D.60%
Answer: C.54.8%
Explanation: Total number of votes polled = (1136 + 7636 + 10628) = 19400
So, Required percentage = 10628/19400 * 100 = 54.8%
C
Question: A sum of Rs. 13500 amounts to Rs. 15500 in 4 years at the rate of simple interest. What is the rate of interest?
A.4%
B.5%
C.6%
D.8%
Answer: A.4%
Explanation: S.I. = (15500 - 13500) = Rs. 2000/-
Rate = (100 * 2000) / (12500 * 4) = 4%
ANSWER:A
Question: A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man's rate is?
A.1
B.6
C.7
D.8
Answer: A.1
Explanation: DS = 6
US = 4
S = ?
S = (6 - 4)/2 = 1 kmph
Answer: A
Question: According to the directions on a can of frozen orange juice concentrate, 1 can of concentrate is to be mixed with 4 cans of water to make orange juice. How many 12 ounce cans of concentrate are required to prepare 180 six-ounce servings of orange juice?
A.15
B.18
C.21
D.24
Answer: B.18
Explanation: 1 X 12 ounce can of concentrate + 4 X 12 ounce cans of water = 60 ounces of the mixture.
60 ounces of mixture gives (60 / 6 ) = 10 servings.
Thus 1 x 12 ounce can of concentrate is used to produce 10 servings of the mixture.
To make 180 servings of the mixture, we need 180 / 10 = 18 cans of the concentrate.
The answer is B.
Question: How many kilograms of tea powder costing Rs. 31 per kg be mixed with 36 kilograms of tea powder costing Rs. 43 per kg, such that the mixture when sold at Rs. 44 per kg gives profit of 10%?
A.12
B.15
C.20
D.10
Answer: A.12
Explanation: SP of the mixture = 44, Profit =10%, Then CP = SP*100/110
44*100/110 = Rs. 40 per kg
Using alligation rule, the required ratio =
31 43
\ /
40
/ \
3 9
= 1:3
If 36 kg is 3 part then 1 part is 36*1/3 =12
ANSWER:A
Question: 10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
A.10
B.5
C.7
D.14
Answer: C.7
Explanation: Work done by 1 woman in 1 day=1/70
Work done by 1 children in 1 day=1/140
Work done by 5 women =5*1/70=5/70
Work done by 10 children =10*1/140=10/140
Amount of work 5 women and 10 children take to complete =5/70+10/140=1/7
5 women and 10 children will complete the work in 7 days.
C
Question: Gopi gives Rs. 90 plus one turban as salary to his servant for one year. The servant leaves after 9 months and receives Rs. 60 and the turban. Find the price of the turban.
A.27
B.30
C.29
D.10
Answer: B.30
Explanation: Let the price of turban be x.
Thus, for one year the salary = (90 + x)
For 9 months he should earn 3434 (90 + x).
Now he gets one turban and Rs. 60.
Thus, 3434 (90 + x) = 60 + x or 270 + 3x = 240 + 4x or x = 30
Answer:B
Question: Pipe A can fill a tank in 6 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes?
A.18
B.27
C.96
D.27
Answer: C.96
Explanation: Let the pipe B be closed after x minutes.
30/6 - x/24 = 1 => x/24 = 30/6 - 1 = 4
=> x = 4 * 24
= 96.
Answer:C
Question: A radio station surveyed 190 students to determine the types of music they liked. The survey revealed that 114 liked rock music, 50 liked folk music, and 41 liked classical music, 14 liked rock music and folk music, 15 liked rock music and classical music, 11 liked classical music and folk music. 5 liked all the three types of music.how many liked rock music, folk music but not classical only?
A.14
B.5
C.114
D.9
Answer: D.9
Explanation: Let R, F and C represent the sets of students who liked rock music, folk music and classical music respectively.
R=114
F=50, C=41
R and F but not C= 14-5=9
ANSWER D
Question: 30 % of 2 is equal to
A.0.2
B.0.4
C.0.6
D.0.7
Answer: C.0.6
Explanation: 30 % of 2 = (30 / 100) * 2 = 0.6
Answer: Option C
Question: 5 is added to a certain number, the sum is multiplied by 2, the product is divided by 5 and 5 is subtracted from the quotient. The remainder left is half of 44. What is the number?
A.21
B.20
C.63
D.30
Answer: C.63
Explanation: Let number is X.
When 5 added to it,
= (X+5)
2 multiplied to sum,
= 2 *(X +5)
Now,
= [{2 *(X +5)} /5]
And,
= [{2 *(X +5)} /5] - 5
According to question,
[{2 *(X +5)} /5] - 5 = half of 44
[(2X + 10) /5) = 22 +5
2X + 10 = 27 *5
2X-135-10
X = 125/2=62.5=63
So, required number is: 63.
ANSWER : C
Question: A batsman in his 12th innings makes a score of 48 and thereby increases his average by 2 runs. What is his average after the 12th innings if he had never been ‘not out’?
A.26
B.43
C.44
D.45
Answer: A.26
Explanation: Let ‘x’ be the average score after 12 th innings
⇒ 12x = 11 × (x – 2) + 48
∴ x = 26
Answer A
Question: An air-conditioning unit costs $470. On December there was a discount for Christmas of 16%. Six months later, the holiday season was over so the company raised the price of the air-conditioning by 18%. How much will an air-conditioning unit cost in November?
A.$466
B.$470
C.$472
D.$484
Answer: A.$466
Explanation: if its prevoius november (before discount) then price is $470.
but if its November of next year then
16% discount on $470=470(1-16/100)=$394.8
again a corrected raised price of 18% over $394.8=394.8(1+18/100)=465.86~$466
Ans A
Question: 200 pupil total,out of 125 like pizza,115 like burger, then how many like both?
A.40
B.50
C.60
D.70
Answer: A.40
Explanation: n(A U B)=n(A) + n(B) - n(A INTERSECTION B)
200 = 125 + 115 - BOTH
BOTH = 240 - 200 = 40.
ANSWER:A
Question: Water consists of hydrogen and oxygen, and the approximate ratio, by mass, of hydrogen to oxygen is 2:16. Approximately how many grams of oxygen are there in 144 grams of water?
A. 16
B. 72
C. 112
D. 128
Answer: D. 128
Explanation: Since the ratio, by mass, of hydrogen to oxygen is 2:16, then oxygen is 16/(2+16)=8/9 of mass of water.
Therefore there are 144*8/9=128 grams of oxygen in 144 grams of water.
Answer: D.
Question: In a two digit number, the digit in the units place is four times the digit in ten's place and sum of the digits is equal to 10. What is the number?
A.25
B.28
C.32
D.36
Answer: B.28
Explanation: Solution
Let the ten digits be x. Then,units digit=4x
Therefore x + 4x = 10
‹=›5x = 10
‹=›x= 2.
So, ten's digit = 2, unit's digit = 8.
Hence, the required number is 28.
Answer B