RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: What is the least number to be subtracted from 800 to make it a perfect square?
A.1
B.16
C.20
D.71
Answer: B.16
Explanation: The numbers less than 800 and are squares of certain number is 784.
The least number that should be subtracted from 800 to make it perfect square = 800 - 784 = 16.
ANSWER:B
Question: Working alone at a constant rate, Alan can paint a house in a hours. Working alone at a constant rate, Bob can point 1/4 of the same house in b hours. Working together, Alan and Bob can paint 1/3 of the house in c hours. What is the value of b in terms of a and c?
A.(3ac)/(a+c)
B.(4a-12c)/(3ac)
C.(3ac)/(4a-12c)
D.(ac)/(a+2c)
Answer: C.(3ac)/(4a-12c)
Explanation: work time
A 1 a
B 1/4 b
A+B 1/3 c
A's rate = 1/a
B's rate = 1/4b
when they are working together , their combined rate is 1/a + 1/(4b) = (1/3)/c
1/(4b) = 1/(3c) - 1/a
=> b = 3ac /(4a-12c)
Answer is C.
Question: Two trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 25 hours respectively. The ratio of their speeds is?
A.4:5
B.5:3
C.4:4
D.4:9
Answer: B.5:3
Explanation: Let us name the trains A and B.
Then, (A's speed) : (B's speed)
= √b : √a = √25 : √9 = 5:3
Answer:B
Question: What is the smallest positive integer that can be multiplied by 605 to make it a perfect square?
A.2
B.3
C.5
D.7
Answer: C.5
Explanation: 605 is multiplied by 5 gives 3025
Its a square root of 55
Answer is 5 -Option C
Question: If 45-[28-{37-(15-*)}]= 54, then * is equal to:
A.-29
B.-19
C.15
D.29
Answer: C.15
Explanation: 45-[28-{37-(15-*)}]= 54 => 45-[28-{37-15+*}]=54
45-[28-37+15-*]=54 => 45[43-37-*]=54
45-[6-*]=54 => 45-6+*=54
39+*=54 => *=54-39
= 19
ANSWER:C
Question: WINK, Inc. follows a certain procedure that requires two tasks to be finished independently in order for a job to be done. On any given day, there is a 5/8 probability that task 1 will be completed on time, and a 3/5 probability that task 2 will be completed on time. On a certain day, what is the probability that task 1 will be completed on time, but task 2 will not?
A.1/4
B.3/40
C.13/40
D.7/20
Answer: A.1/4
Explanation: P(1 and not 2)=5/8*(1-3/5)=1/4
Answer: A.
Question: Kim purchased n items from a catalog for $8 each. Postage and handling charges consisted of $3 for the first item and $1 for each additional item. Which of the following gives the total dollar amount for Kim’s purchase, including postage and handling, in terms of n ?
A.8n + 2
B.8n + 4
C.9n + 2
D.9n + 3
Answer: C.9n + 2
Explanation: n items for $8 each
total price $8n
postage and handling of $3 for 1st item and $1 for the rest
total postage and handling = $ [3+ (n-1)]
= $ n+2
total cost
8n+n+2 = 9n+2	;
ANSWER:C
Question: |8 - 3| - |4 - 6| = ?
A.3
B.2
C.1
D.0
Answer: A.3
Explanation: |8 - 3| - |4 - 6| = | 5 | - | -2 | = 5 - 2 = 3
correct answer A
Question: In a certain year, the population of a certain town was 9000. If in the next year the population of males increases by 4% and that of the females by 9% and the total population increases to 9600, then what was the ratio of population of males and females in that given year?
A.7 : 8
B.5 : 4
C.2 : 3
D.Data inadequate
Answer: A.7 : 8
Explanation: Let the population of males = x; then the population of females = 9000 – x
Now, 4% of x + 9% of (9000 – x)
= (9600 – 9000 ) = 600
or 0.04x + 720 – 0.09x = 600
or 720 – 600 = 0.09x – 0.04x
or, 120 = 0.05x
x = 4200
Reqd ratio of population of males and females
4200/9000−4200=4200/4800=7:8
Answer A
Question: A library has an average of 540 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:
A.300
B.276
C.290
D.285
Answer: C.290
Explanation: Since the month begins with sunday,to there will be five sundays in the month
Average required = (540x5 + 240x25) /30) = 290
Answer: Option C
Question: Nil and Ethan are brothers. They left their home
at the same time and drove to the same beach.
Nil drove at a speed of 60 miles per hour. Ethan
drove at a speed of 20 miles per hour. Nil
arrived at the beach 0.5 hour earlier than Ethan.
What is the distance between their home and the
beach?
A.50 miles
B.60 miles
C.70 miles
D.80 miles
Answer: B.60 miles
Explanation: Every hour, Nil gets ahead of Ethan 60 - 20 =
40 miles. When Nil arrived at the beach, Ethan
is only 20 × 0.5 = 10 miles behind. That tells us
they only drove 1 hour when Nil arrived at the
beach.
The distance between their home and the beach
is
Nil’s speed × Nil’s time
= 60 × 1 = 60 miles.
correct answer B
Question: A volume of 10940 l water is in a container of sphere. How many hemisphere of volume 4l each will be required to transfer all the water into the small hemispheres?
A.2812
B.8231
C.2734
D.2735
Answer: D.2735
Explanation: a volume of 4l can be kept in 1 hemisphere
therefore, a volume of 10940l can be kept in (10940/4) hemispheres
ans.2735
ANSWER:D
Question: If 20% of a certain number is 60, then what is 80% of that number?
A.220
B.210
C.240
D.250
Answer: C.240
Explanation: Explanation:
20% = 20*3 = 60
80% = 80*3= 240
Answer: Option C
Question: At a simple interest 800 becomes 956 in three years. If the interest rate, is increased by 3%, how much would 800 become in three years?
A.1020.80
B.1004
C.1028
D.Data inadequate
Answer: C.1028
Explanation: Rate of interest = 956−800/3×800×100=6.50%
\Amount = 800 + 800×9.5×3/100
= 800 + 228 = 1028
Answer C
Question: On a certain plane, 2/5 of the passengers speak English and 3/4 speak Hebrew. If all of the passengers on the plane speak at least one of these languages, what is the smallest number of passengers that could be on the plane?
A.12
B.15
C.100
D.124
Answer: C.100
Explanation: Assume the total members = x
English = .4x
Hebrew = .75x
English + Hebrew = 1.15x, but this is not possible hence 15 people speak both languages.
Only English = .25x, Only Hebrew = .6x, both = .15x
Since these are all people, all of these should be whole numbers.
Checking the options:
A. 12. Only Hebrew = 12*0.6 = 7.2 We do not get the people as whole numbers. INCORRECT
B. 15. Only English = 0.25*15 Again we do not get the people as whole numbers. INCORRECT
C. 100 Only English = .25*100 = 25, Only Hebrew = .6*100 = 60, both = .15*100 = 15. We have the people as whole numbers. CORRECT
D. 124
E. 130
Since we have to find the lowest number, no need to calculate for the rest of the options.
Correct Option: C
Question: In a game of billiards, A can give B 20 points in 60 and he can give C 30 points in 60. How many points can B give C in a game of 100?
A.14
B.56
C.25
D.28
Answer: C.25
Explanation: A scores 60 while B score 40 and C scores 30.
The number of points that C scores when B scores 100
= (100 * 30)/40
= 25 * 3 = 75.
In a game of 100 points, B gives (100 - 75)
= 25 points to C.
Answer:C
Question: On what dates of April, 2001 did Wednesday fall?
A.4th,11th,18th,29th
B.4th,11th,18th,25th
C.4th,11th,18th,85th
D.4th,11th,18th,79th
Answer: B.4th,11th,18th,25th
Explanation: Explanation:
We shall find the day on 1st April, 2001.
1st April, 2001 = (2000 years + Period from 1.1.2001 to 1.4.2001)
Odd days in 1600 years = 0
Odd days in 400 years = 0
Jan. Feb. March April
(31 + 28 + 31 + 1) = 91 days 0 odd days.
Total number of odd days = (0 + 0 + 0) = 0
On 1st April, 2001 it was Sunday.
In April, 2001 Wednesday falls on 4th, 11th, 18th and 25th
Answer: B) 4th,11th,18th,25th
Question: A race course is 400 m long. AA and BB run a race and AA wins by 5m. BB and CC run over the same course and BB win by 4m. CC and DD run over it and DD wins by 16m. If AA and DD run over it, then who would win and by how much?
A.7.1 m
B.7.2 m
C.8 m
D.9 m
Answer: B.7.2 m
Explanation: If AA covers 400m, BB covers 395 m
If BB covers 400m, CC covers 396 m
If DD covers 400m, CC covers 384 m
Now if BB covers 395 m, then CC will cover 396400×395=391.05396400×395=391.05m
If CC covers 391.05 m, then DD will cover 400384×391.05=407.24400384×391.05=407.24
If AA and DD run over 400 m, then DD win by 7.2 m
Option B
Question: A runs 1 2/3 times as fast as B. If A gives B a start of 80 m, how far must the winning post be so that A and B might reach it at the same time?
A.200 m
B.300m
C.270m
D.160m
Answer: A.200 m
Explanation: Explanation:
Ratio of the speeds of A and B =5 : 1 = 5 :3
Thus, in race of 5 m, A gains 2 m over B.
2 m are gained by A in a race of 5 m.
80 m will be gained by A in race of 5/2X80 m=200m
Winning post is 200 m away from the starting point.
ANSWER IS A
Question: Sum of the numbers from 1 to 20 is
A.210
B.110
C.220
D.105
Answer: A.210
Explanation: Explanation: Sum of first n natural numbers = 1 + 2 + 3 + ..... n = n(n+1)/2
Substitute n = 20.
So S20=20×21/2=210
Correct Option: A
Question: In how many different ways can the letters of the word 'CAREER' be arranged?
A.10 ways
B.20 ways
C.180 ways
D.60 ways
Answer: C.180 ways
Explanation: Totally there are 6 letters on the word CAREER. it contains 1C,1A,2R,2E.
The no of ways is 6!/2!2!=180 ways.
ANSWER:C
Question: In a simultaneous throw of pair of dice .find the probability of getting the total more than 7
A.7/12
B.6/7
C.5/12
D.8/7
Answer: C.5/12
Explanation: Here n(S)=(6*6)=36
let E=event of getting a total more than 7
={(2,6),(3,5),(3,6),(4,4),(4,5),(4,6),(5,3),(5,4),(5,5),(5,6),(6,2),(6,3),(6,4),(6,5),(6,6)}
P(E)=n(E)/n(S)=15/36=5/12.
Option: C
Question: Two men and three women working 7 hours a day finish a work in 5 days. Four men and four women working 3 hours a day complete the work in 7 days. The number of days in which only 7 men working 4 hours a day will finish the work is?
A.5 days
B.6 days
C.9 days
D.2 days
Answer: A.5 days
Explanation: 2M + 3W ----- 35 h
4M + 4W ------- 21 h
7M -------? d
70M + 105W = 84M +84M
21W = 14M => 2M = 3W
4 * 35 = 7 * x => x = 20 hours
20/4 = 5 days
Answer:A
Question: Look at this series: 42, 42, 30, 30, 18, 18, .. What number should come next?
A.06
B.12
C.14
D.32
Answer: A.06
Explanation: In this series, each number is repeated, then 12 is subtracted to arrive at the next number.
The answer is option A (06)
Question: A factory has a fixed cost of $45,000 a month, and a cost of $2.5 for every item produced. If the selling price of a single item is $5, what is the number of items must be sold monthly for the factory to cover its cost exactly?
A.9,000
B.14,000
C.18,000
D.22,500
Answer: C.18,000
Explanation: selling price - Cost price = 2.5 so per unit profit =2.5
cost to recover =45000
no of items required = 45000/2.5 = 18000
Answer: C
Question: On dividing 83 by a number, the quotient is 9 and the remainder is 2. Find the divisor?
A.7
B.8
C.9
D.10
Answer: C.9
Explanation: d = (D-R)/Q
= (83 - 2)/9
= 81/9 = 9
C)
Question: Yesterday it took Robert 4 hours to drive from City A to City B. Today it took Robert 3.5 hours to drive back from City В to City A along the same route. If he had saved 15 minutes in both trips, the speed for the round trip would be 60 miles per hour. What is the distance between city A and city B?
A. 90
B. 120
C. 150
D. 210
Answer: D. 210
Explanation: 2d/60 = 7 ( because time = 4 + 3.5 - 0.5 hrs)
=> d = 210
Answer - D
Question: The length of the bridge, which a train 110 meters long and travelling at 45 km/hr can cross in 30 seconds, is:
A.265
B.244
C.245
D.238
Answer: A.265
Explanation: Speed = (45 * 5/18) m/sec = (25/2) m/sec. Time = 30 sec. Let the length of bridge be x meters. Then, (110 + X)/30 = 25/2 ==> 2(110 + X) = 750 ==> X = 265 m.
Answer: Option A
Question: A pump can fill a tank with water in 2 hours. Because of a leak, it took 2x1/3 hours to fill the tank. The leak can drain all the water of the tank in
A.5 hours
B.7 hours
C.8 hours
D.14 hours
Answer: D.14 hours
Explanation: Solution
Work done by the leak in 1 hour	=(1/2 - 3/7)
‹=›1/14.
Leak will empty the tank in 14 hours.
Answer D
Question: A painter intends to mixed two jars of paint to create a new color. He chooses one paint jar randomly from a display containing 5 red and 2 blue samples, and a second jar is chosen at random from a different display containing 3 red and 2 blue samples. If he plans on mixing the two chosen jars together, what is the probability that when mixed together, the result will be purple paint? (The color purple is created with 1 part red and 1 part blue.)
A.1/5
B.1/2
C.2/3
D.4/5
Answer: A.1/5
Explanation: Painter has two buckets he has to randomly pick from 2 different lists ... Let these Lists be A and B ... He has to choose the first bucket from List A , and the second bucket from List B
FOR THE FIRST BUCKET ...
Red color - 2
Blue color - 2
FOR THE SECOND BUCKET
Red color - 3
Blue color -2
In order to get Purple he has to mix red with blue .. Both the LISTS contain either blue or red , therefore we have two scenarios :
Scenario I - He picks Red color from List A and Blue color from List B
Scenario II - He picks Blue color from List A and Red color from List B
Scenario I - Odds for red color from List A are 1/2 .. and for Blue color from List B are 2 /5 .. Multiplying them (because we have to find the odds that both colors are selected from their respective lists together (this is a AND not an OR problem) we get 1/5
Scenario II - Odds for blue color from List A are 1/2 , and for Red color from List B are 3/5 ... Multiplying them we get 3/10 ...
Both the scenarios are equally possible therefore we must ADD the two (not multiply ) because both of them do not have to hold true together (have to independently) for our desired result to be achieved ...
We get 1/5 + 3/10 = 1/5 A)
Question: Look at this series: 6.2, 6.8, 7.4, 8, ... What number should come next?
A.9
B.8.9
C.8.7
D.8.6
Answer: D.8.6
Explanation: D
8.6
In this simple addition series, each number increases by 0.6.
Question: A Man travelled a distance of 70 km in 9 hours. He travelled partly on foot at 6 km/hr and partly on bicycle at 9 km/hr. What is the distance travelled on foot?
A.16 km
B.14 km
C.12 km
D.42 km
Answer: D.42 km
Explanation: Explanation:
Let the time in which he travelled on foot = x hour
Time for travelling on bicycle = (9 - x) hr
Distance = Speed * Time, and Total distance = 70 km
So,
6x + 9(9-x) = 70
=> 3x = 21
=> x = 7
So distance traveled on foot = 6(7) = 42 km
Answer: Option D
Question: A bookseller sells his books at a 20% markup in price. If he sells a book for $36.00, how much did he pay for it?
A.$34.40
B.$34.00
C.$32.00
D.$30.00
Answer: D.$30.00
Explanation: Let the cost price of book = x
Selling price of book = 36$
Markup % = 20
(120/100)x = 36
=> x = 30
Answer D
Question: Kim bought a total of $2.65 worth of postage stamps in four denominations. If she bought an equal number of 2-cent and 20-cent stamps and twice as many 10-cent stamps as 5-cent stamps, what is the least number of 1-cent stamps she could have bought?
A.5
B.10
C.55
D.80
Answer: C.55
Explanation: Let:
# of 2 and 20 cents stamps = n
# of 10 cent stamps = 2n
# of 1 cent stamps = m
Therefore:
2n + 20n + 10(2n) + m = 265 cents
42n + m = 265
Forleastnumber of 1 cents stamps, maximize 50n. Hence,
42*5 + m = 265
m = 55 i.e. 55 stamps 1 cents each
Answer: C
Question: Series C(n) is such that i*C(i) = j*C(j) for any pair of positive integers (i, j). If C(1) is a positive integer, which of the following is possible?
I. 2*C(100) = C(99) + C(98)
II. C(1) is the only integer in the series
III. The series does not contain negative numbers
A.I only
B.II only
C.IIII only
D.IIIII only
Answer: D.IIIII only
Explanation: First thing I want to understand is this relation: i*C(i) = j*C(j) for any pair of positive integers. I will take examples to understand it.
When i = 1 and j = 2, C(1) = 2*C(2)
So C(2) = C(1)/2
When i = 1 and j = 3, C(1) = 3*C(3)
So C(3) = C(1)/3
I see it now. The series is: C(1), C(1)/2, C(1)/3, C(1)/4 and so on...
II and III are easily possible. We can see that without any calculations.
II. C(1) is the only integer in the series
If C(1) = 1, then series becomes 1, 1/2, 1/3, 1/4 ... all fractions except C(1)
III. The series does not contain negative numbers
Again, same series as above applies. In fact, since C(1) is a positive integer, this must be true.
I. 2*C(100) = C(99) + C(98)
2*C(1)/100 = C(1)/99 + C(1)/98 (cancel C(1) from both sides)
2/100 = 1/99 + 1/98
Not true hence this is not possible
Answer (D)
Question: At a meeting of 8 Chiefs of Staff, the Chief of Naval Operations does not want to sit next to the Chief of the National Guard Bureau. How many ways can the Chiefs of Staff be seated around a circular table?
A.2400
B.2800
C.3200
D.3600
Answer: D.3600
Explanation: 8 people can be arranged around a table in 7! ways.
Consider the two chiefs who will not sit together as a single unit.
The number of ways to arrange 7 units around a table is 6!
We need to multiply this by 2 as the two people can be switched in each arrangement.
The total number of ways to arrange the chiefs is 7! - 2*6! = 5*6! = 3600
The answer is D.
Question: A grocery store bought some mangoes at a rate of 5 for a dollar. They were separated into two stacks, one of which was sold at a rate of 4 for a dollar and the other at a rate of 6 for a dollar. What was the ratio of the number of mangoes in the two stacks if the store broke even after having sold all of its mangoes?
A.1:4
B.1:5
C.2:3
D.3:2
Answer: D.3:2
Explanation: The cost price of a mango = 1/5 dollars.
The selling price of a mango from the first stack = 1/4 dollars --> the profit from one mango = 1/4 - 1/5 = 1/20 dollars.
The selling price of a mango from the second stack = 1/6 dollars --> the loss from one mango = 1/5 - 1/6 = 1/30 dollars.
The profit from one mango from the first stack is 4 times the loss from one mango from the second stack. the ratio is
1/20*30/1= 3:2
D
Question: Shiva decided to drive through the city and on the first day he drove for only 7 miles. On the last day he drove for 51 miles, increasing his journey 4 miles each day. Calculate the number of days he traveled and how far did he travel?
A.335 miles in 10 days
B.348 miles in 12 days
C.338 miles in 15 days
D.358 miles in 12 days
Answer: B.348 miles in 12 days
Explanation: According to the question
miles travelled in 2nd day = 7+4
miles travelled by 3rd, 4th....= 7 + 2*4,7 + 3*4......
A.P. = 7,7+4,7+2*4,......7 + ( n-1)4
IT's given
7 + (n-1)4 = 51
(n-1)4 = 44
n -1 = 11
n = 12
Total number of days = 12
total miles travelled Shiva
= n/2(a + l) [ a = 1st term , l = last term]
= 12/2(7 + 51)
= 6(58)
= 348
so total miles 348 travelled in 12 days
ANSWER:B
Question: At a game of billiards, A can give B 15 points in 60 and A can give C to 20 points in 60. How many points can B give C in a game of 90?
A.10
B.12
C.13
D.15
Answer: A.10
Explanation: A:B= 60: 45
A:C = 60: 40
B/C = (B/A*A/C) = (45/60 * 60/40) = 45/40 = 90/80
=90:80
=>10 points of 90
ANSWER A
Question: If positive integer n is divisible by both 5 and 18, then n must be divisible by which of the following?
A.8
B.12
C.17
D.30
Answer: D.30
Explanation: A number divisible by both 5,18 is 90 which s divisible by 30.
IMO : Answer D 30
Question: There are 100 students in 3 sections A, B and C of a class. The average marks of all the three sections was 84. The average of B and C was 87.5 and the average marks of students in A section was?
A.20
B.99
C.28
D.27
Answer: A.20
Explanation: Numbers of students in section A = x
Numbers of students in section B and C = (100 – x)
x 70 + (100 – x) 87.5 = 84 100
70x + 87.5 100 – 87.5x = 8400
8750 – 17.5x = 8400
17.5x = 8750 – 8400 => x = 20.
Answer: A
Question: A money lender lends Rs.2000 for six months at 20% p.a. rate. It the interest is reckoned quarterly than find the amount given after time limit.
A.Rs.2205
B.Rs.2200
C.Rs.2160
D.Rs.2040
Answer: A.Rs.2205
Explanation: A = 2000(21/20)2 = 2205
ANSWER:A
Question: Meena wrote all the numbers from 1 to 39,999 inclusive. How many digits did she write in total?
A.156,789
B.188,889
C.192,389
D.241,689
Answer: B.188,889
Explanation: 1-9=>1*9 digits
10-99=>2*90=180 (numbers between 10-99 is 90 where each has 2 digits)
100-999=>3*900=2700
1000-9999=>4*9000 = 36,000
10000-39999=>5*30,000 = 150,000
The answer is 188,889
The answer is B.
Question: How many different 3 letter combinations can be created from the letters X,Y and Z?
A.27
B.3
C.9
D.81
Answer: A.27
Explanation: This is a case of number of arrangements possible with repetition.
Thus you have 3 options each for the 1st,2nd and 3rd letter giving you a total of 3*3*3 = 27 number of possible combinations.
Answer : A
Question: Two stations P and Q are 110 km apart on a straight track. One train starts from P at 7 a.m. and travels towards Q at 20 kmph. Another train starts from Q at 8 a.m. and travels towards P at a speed of 25 kmph. At what time will they meet?
A.10.3
B.10
C.8.45
D.9.3
Answer: B.10
Explanation: Explanation:
Assume both trains meet after x hours after 7 am
Distance covered by train starting from P in x hours = 20x km
Distance covered by train starting from Q in (x-1) hours = 25(x-1)
Total distance = 110
=> 20x + 25(x-1) = 110
=> 45x = 135
=> x= 3
Means, they meet after 3 hours after 7 am, ie, they meet at 10 am
ANSWER IS B
Question: A bank offers 5% compound interest calculated on half-yearly basis. A customer deposits $ 1600 each on 1stJanuary and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is:
A.120
B.121
C.122
D.123
Answer: B.121
Explanation: Amt = (1600*(1+5/2*100) ^2 + 1600 * (1+5/2*100)
=$ 3321
CI = $(3321-3200) = $121
ANSWER B
Question: Sides of a rectangular park are in the ratio 3: 2 and its area is 2400 sq m, the cost of fencing it at 50 ps per meter is?
A.287
B.100
C.125
D.988
Answer: B.100
Explanation: 3x * 2x = 2400 => x = 20
2(60 + 40) = 200 m
200 * 1/2 = Rs.100
Answer: B
Question: Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in
A.1×13/17 hours
B.2×8/11 hours
C.3×9/17 hours
D.4×1/2 hours
Answer: C.3×9/17 hours
Explanation: (a+b+c) can fill in (1/5+1/6-1/12) =3x9/17
ANSWER:C
Question: Before January, the price of a dress was D and the price of a matching pair of shoes was H. In January, the price of the dress increased by 40% and the price of the shoes increased by 50%. In March, Roberta bought both items with a 30% discount. If D = 3H, which of the following represents the amount that Roberta paid?
A.D + 40
B.D + H – 1
C.D + 2H
D.3.99H
Answer: D.3.99H
Explanation: before Discount price was: 1.4D+1.5H
After Discount: 1.4D +1.5H-.42D-.45H
substitute D=3H
final value: 3.99H
Ans Is D :
Question: The average (arithmetic mean) of the even integers from 20 to 60 inclusive is how much greater than the average (arithmetic mean) of the even integers from 10 to 140 inclusive?
A.40
B.15
C.35
D.20
Answer: C.35
Explanation: So, according to A mean of a set of even numbers from 20 to 60 =(20+60)/2=40 and mean of a set of even numbers from 10 to 140 =(10+140)/2=75
Difference=75-40=35
Answer: C.
Question: A train is 360 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length?
A.22 seconds
B.77 seconds
C.40 seconds
D.57 seconds
Answer: C.40 seconds
Explanation: Speed = 45 Km/hr = 45*(5/18) m/sec = 25/2 m/sec
Total distance = 360+140 = 500 meter
Time = Distance/speed
= 500 * (2/25) = 40 seconds
Answer:C
Question: Find the missing value: ? - 1936248 = 1635773
A.3572021
B.3570221
C.3572012
D.3752012
Answer: A.3572021
Explanation: Let x - 1936248=1635773.Then, x = 1635773 + 1936248=3572021
Answer is A.
Question: List I: { y, 2, 4, 7, 10, 11}
List II: {3, 3, 4, 6, 7, 10}
If the median R of List I is equal to the sum of the median of list II and the mode of list II, then y equals
A.5
B.7
C.8
D.R=9
Answer: D.R=9
Explanation: mode of list ii =3
median R of list ii =4+6/2 =5
sum of mode + mean = 3+ 5=8
now to make 8 as the median we need to find a value of y such that if the no. of terms in list 1 are odd then y=8 else if even then 7+y /2=8
here its even so
7+y/2=8 from this y= 9 (D)