RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: Bag contain 10 back and 20 white balls, One ball is drawn at random. What is the probability that
ball is white
A.1
B.2/3
C.1/3
D.4/3
Answer: B.2/3
Explanation: Explanation:
Total cases = 10 + 20 = 30
Favourable cases = 20
So probability = 20/30 = 2/3
Answer: B
Question: Pandi and Rani invested in a business. They earned some profit which they divided in the ratio of 3:2. If Pandi invested Rs.30, 000, the amount invested by Rani is:
A.Rs. 65,000
B.Rs. 20,000
C.Rs. 80,000
D.Rs. 90,000
Answer: B.Rs. 20,000
Explanation: Invested by Rani = 30000/3*2 = 20000
Answer : B
Question: In a graduating class, the difference between the highest and lowest salaries is $100,000. The median salary is $50,000 higher than the lowest salary and the average salary is $20,000 higher than the median. What is the minimum number of students T in the class?
A.A)10
B.B)12
C.C)15
D.D)20
Answer: C.C)15
Explanation: the difference between the highest and lowest salaries is $100,000.
So there are at least 2 people - say one with salary 0 and the other with 100k. No salary will be outside this range.
Median = 50k more than lowest. So median is right in the center of lowest and highest since lowest and highest differ by 100k. In our example, median = 50k. Since there are more than 2 people, there would probably be a person at 50k.
Mean = 20k more than median so in our example, mean salary = 70k
On the number line,
0........50k (median)........100k
Mean = 70k
So there must be people more toward 100k to bring the mean up to 70k. Since we want to add minimum people, we will add people at 100k to quickly make up the right side deficit. 0 and 50k are (70k + 20k) = 90k away from 70k. 100k is 30k away from 70k. To bring the mean to 70k, we will add two people at 100k each to get:
0....50k.....100k, 100k, 100k
But when we add more people to the right of 70k, the median will shift to the right. We need to keep the median at 50k. So every time we add people to the right of 70k, we need to add people at 50k too to balance the median. 50k is 20k less than 70k while 100k is 30k more than 70k. To keep the mean same, we need to add 2 people at 100k for every 3 people we add at 50k. So if we add 3 people at 50k and 2 people at 100k, we get:
0, ... 50k, 50k, 50k, 50k, ... 100k, 100k, 100k, 100k, 100k
the median is not at 50k yet.
Add another 3 people at 50k and another 2 at 100k to get
0, 50k, 50k, 50k, 50k, 50k, 50k, 50k, 100k, 100k, 100k, 100k, 100k, 100k, 100k
Now the median is 50k and mean is 70k.
Total number of people is 15.
Answer (C)
Question: Two persons A and B take a field on rent. A puts on it 21 horses for 3 months and 15 cows for 2 months; B puts 15 cows for 6months and 40 sheep for 7 1/2 months. If one day, 3 horses eat as much as 5 cows and 6 cows as much as 10 sheep, what part of the rent should A pay?
A.1/3 rd
B.2/5 th
C.2/3 rd
D.1/5 th
Answer: A.1/3 rd
Explanation: 3h = 5c
6c = 10s
A = 21h*3 + 15c*2
= 63h + 30c
= 105c + 30c = 135c
B = 15c*6 + 40s*7 1/2
= 90c + 300s
= 90c + 180c = 270c
A:B = 135:270
27:52
A = 27/79 = 1/3
ANSWER:A
Question: If p - q = 2 and
p2+q2=26
, find the value of pq.
A.7
B.8
C.9
D.11
Answer: D.11
Explanation: Explanation:
We know
2ab=(a2+b2)âˆ’(aâˆ’b)2
2pq=26âˆ’4=22
=>pq=11
Option D
Question: A cylinder of height h is 5/6 of water. When all of the water is poured into an empty cylinder whose radius is 25 percent larger than that of the original cylinder, the new cylinder is 3/5 full. The height of the new cylinder is what percent of h?
A.25%
B.50%
C.60%
D.72%
Answer: D.72%
Explanation: Basically we can disregard the radius is 25% information, as we are only asked about the height of the original and the new cylinder.
This is becausethe new cylinder is 3/5 fullmeans the same as that it's height is 3/5.
Original cylinder 5/6
New cylinder 3/5
So 3/5/5/6 = 3/5 *6/5= 0.72 or 72%.
Answer D
Question: In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is 1/6. For a group of 200 newborn members of the population, approximately how many would be expected to survive the first 3 months of life?
A.116
B.146
C.152
D.162
Answer: A.116
Explanation: The probability of survival for each of the first 3 months of life is 1-1/6= 5/6, so of 200 newborn 200*5/6*5/6*5/6=~116 is expected to survive.
Answer: A.
Question: A train passes a station platform in 34 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
A.200
B.210
C.240
D.250
Answer: B.210
Explanation: Speed = [54 * 5/18] m/sec = 15 m/sec.
Length of the train = (15 * 20) m = 300 m.
Let the length of the platform be x meters.
Then, x + 300 / 34 = 15
x + 300 = 510
x = 210 m.
Answer: Option B
Question: If r<0, which of the following must be true?
A.–100 < r < 100
B.r ≤ –1
C.r ≤ 1
D.r^2 ≥ 1/4
Answer: C.r ≤ 1
Explanation: r is a negative number.
A. –100 < r < 100r can be a negative number less than -100
B. r ≤ –1r can be a fraction, in which case it would be greater than -1
C. r ≤ 1must be true since 1 is positive and r is negative
D. r^2 ≥ 1/4not true if r is a negative fraction like -1/5
E. –100 < r < 0r can be a negative number less than -100=C
Question: What is the solution of the equations x - y = 0.1 and 1(x + y)-1 = 2 ?
A.x = 0.3, y = -0.2
B.x = 1, y = 0.1
C.x = 2, y = 1.1
D.x = 1.2, y = 0.3
Answer: A.x = 0.3, y = -0.2
Explanation: Answer
x - y = 0.1 ...(i)
and 1(x + y)-1=2
⇒ 1/ (x + y) = 2
⇒ 2(x + y) =1
⇒ x + y = 1/2 ...(ii)
On solving Eqs.(i) and (ii),we get
x = 0.3
and y = -0.2
Correct Option: A
Question: Anthony and Michael sit on the six member board of directors for company X. If the board is to be split up into 2 three-person subcommittees, what percent Q of all the possible subcommittees that include Michael also include Anthony?
A. 20%
B. 30%
C. 40%
D. 50%
Answer: C. 40%
Explanation: The answer is C. Let's look at a committee where Mike belongs (he's person # 1) on that committee. When we choose person #2, there is a 1/5 probability that it's going to be Anthony (then it doesn't matter who the third person is), and 4/5 probability that it's going to be someone else (then person #3 is going to be Anthony with probability 1/4). Total probability Q= 1/5+4/5*1/4 = 2/5.C
Question: 78 laboratories raise the bacterium, the laboratory have 48 culture dishes on average, which has about 25,075 bacteria each. How many bacteria are there approximately?
A.10^7
B.10^8
C.10^9
D.10^10
Answer: B.10^8
Explanation: 78 laboratories raise the bacterium, the laboratory have 48 culture dishes on average, which has about 25,075 bacteria each. How many bacteria are there approximately?
A. 10^7
B. 10^8
C. 10^9
D. 10^10
E. 10^11
-> Due to approximately, 78=80, 48=50, 25,075=25,000 are derived, which makes (78)(48)(25,075)=(80)(50)(25,000)=10^8. The answer is B.
Question: A, B and C enter into partnership. A invests some money at the beginning, B invests double the amount after 6 months, and C invests thrice the amount after 8 months. If the annual gain be Rs.18900. A's share is?
A.6300
B.2765
C.6000
D.1298
Answer: A.6300
Explanation: x* 12 : 2x* 6: 3x* 4
1:1:1
1/3 * 18900 = 6300
Answer:A
Question: What is the 4 digit no. in which the 1st digit is 1/3 of the second, the 3rd is the sum of the 1st and 2nd, and the last is 3 times the second?
A.1123
B.1234
C.1349
D.1455
Answer: C.1349
Explanation: First digit is 1/3 second digit => The numbers can be 1 & 3, 2& 6, 3 & 9.
First + second = third => we can eliminate 3 & 9 since 3 + 9 = 12.
Last is 3 times the second => we can eliminate option 2 & 6 since 3 * 6 = 18.
Hence the number is 1349
C
Question: Sides of a rectangular park are in the ratio 3: 2 and its area is 3750 sq m, the cost of fencing it at 50 ps per meter is?
A.287
B.369
C.125
D.279
Answer: C.125
Explanation: 3x * 2x = 3750 => x = 25
2(75 + 50) = 250 m
250 * 1/2
= Rs.125
Answer:C
Question: In what time will a train 100 m long cross an electric pole, it its speed be 144 km/hr?
A.2.5 sec
B.2.6 sec
C.2.7 sec
D.2.8 sec
Answer: A.2.5 sec
Explanation: Speed = 144 * 5/18 = 40 m/sec
Time taken = 100/40 = 2.5 sec.
Answer: Option A
Question: A bus trip of 360 miles would have taken 1 hour less if the average speed V for the trip had been greater by 5 miles per hour. What was the average speed V, in miles per hour, for the trip?
A.35
B.40
C.45
D.50
Answer: B.40
Explanation: The time is the distance/speed. The time difference is 1 hour.
360/V - 360/(V+5) = 1
360(V+5) - 360V = (V)(V+5)
1800 = (V)(V+5)
40*45 = (V)(V+5)
V = 40 mph
The answer is B.
Question: By selling 10 pencils for a rupee a man loses 15%. How many for a rupee should he sell in order to gain 15%?
A.8.39
B.6.39
C.7.39
D.9.39
Answer: C.7.39
Explanation: 85% --- 10115% --- ?85/115 * 10 = 7.39Answer: C
Question: 4,6,8,10,12,....
A.58
B.14
C.61
D.62
Answer: B.14
Explanation: 2*2=4
3*2=6
4*2=8
5*2=10
6*2=12
7*2=14
ANSWER:B
Question: Johnson has a corporate proposal. The probability that vice-president Adams will approve the proposal is 0.6. If VP Adams approves the proposal, then the probability that vice-president Baker will approve the proposal is 0.2. If VP Adams doesn’t approve the proposal, then the probability that vice-president Baker will approve the proposal is 0.3. What is the probability that at least one of the two VPs, approves Johnson’s proposal?
A.0.36
B.0.24
C.0.28
D.0.48
Answer: A.0.36
Explanation: (1at approves * second rejects ) + (1st rejects * 2nd approves ) + (both approves )
=0.6*0.2+0.4*0.3+0.6*0.2
= 0.12+0.12+0.12
=0.36
A
Question: JOHN and Antony can finish the work 36 days if they work together. They worked together for 24 days and then Antony left. JOHN finished the remaining work in another 24 days. In how many days JOHN alone can finish the work?
A.30 days
B.72 days
C.70 days
D.80 days
Answer: B.72 days
Explanation: Amount of work done by JOHN and Antony in 1 day = 1/36
Amount of work done by JOHN and Antony in 24 days = 24 Ã— (1/36) = 2/3
Remaining work â€“ 1 â€“ 2/3 = 1/3
JOHN completes 1/3 work in 24 days
Amount of work JOHN can do in 1 day = (1/3)/24 = 1/72
=> JOHN can complete the work in 72 days
Answer : B
Question: A cycle is bought for Rs.750 and sold for Rs.1080, find the gain percent?
A.22
B.44
C.99
D.88
Answer: B.44
Explanation: 750 ---- 180
100 ---- ? => 44%
Answer:B
Question: The sum of first four prime numbers is?
A.17
B.23
C.24
D.28
Answer: A.17
Explanation: Required sum = (2 + 3 + 5 + 7) = 17.
Note: 1 is not a prime number.
Definition: A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself.
A
Question: 3 men and 8 women complete a task in same time as 6 men and 2 women do. How much fraction of work will be finished in same time if 5 men and 2 women will do that task.
A.6/7
B.3/10
C.3/18
D.3/16
Answer: A.6/7
Explanation: 3 m + 8 w = 6 m + 2 w
3 m = 6 w
1 m = 2 w
Therefore 3 m + 8 w = 14 w
5 m +2 w =12 w
Answer is 12/14 =6/7
Answer: A
Question: Micheal and Adam can do together a piece of work in 20 days. After they have worked together for 14 days Micheal stops and Adam completes the remaining work in 10 days. In how many days Micheal complete the work separately.
A.50 days
B.100 days
C.120 days
D.110 days
Answer: A.50 days
Explanation: Rate of both = 1/20
Together they do = 1/20*14 = 7/10
Left work = 1 - 7/10 = 3/10
Adam completes 3/10 work in 10 day
so he took 10*10/3 = 100/3 days to complete the left work alone.
Thus the rate of adam is 3/100
Rate of Micheal = 1/20 - 3/100 = 1/50
Thus micheal takes 50 days to complete the whole work.
ans. A
Question: There were two candidates in an election. Winner candidate received 62% of votes and won the election by 360 votes. Find the number of votes casted to the winning candidate?
A.456
B.744
C.930
D.1200
Answer: C.930
Explanation: W = 62% L = 38%
62% - 38% = 24%
24% -------- 360
62% -------- ? => 930
ANSWER:C
Question: Alfred buys an old bike for Rs. 4700 and spends Rs. 800 on its repairs. If he sells the bike for Rs. 5800, his gain percent is?
A.5 5/11%
B.5%
C.5/7%
D.6%
Answer: A.5 5/11%
Explanation: Cost Price (C.P.) = Rs. (4700 + 800) = Rs. 5500.
Selling Price (S.P.) = Rs. 5800.
Gain = (S.P.) - (C.P.) = Rs.(5800 - 5500) = Rs. 300.
Gain % = 300	x 100	%	= 5	5	%
5500	11
A)
Question: Diane find 2 and a half cans of paint are just enough to paint one third of her room. How many more cans of paint will she need to finish her room and paint a second room of the same size?
A.5
B.7 and a half
C.10
D.12 and a half
Answer: D.12 and a half
Explanation: We know that 2.5 cans = 25/10 is used to paint 1/3 of a room. We need to find how much paint we'll need in order to paint the rest of the room (1-1/3=2/3) and 1 room more, hence 2/3+1=5/3
25/10 : 1/3 = x : 5/3
(25/10)*(5/3) = (1/3)*x
25/6=x/3
6*x=25*3
x=75/6
x=12.5
ANSWER:D
Question: Two cars, Car1 and Car2 move towards each other from Q and Y respectively with respective speeds of 20 m/s and 15 m/s. After meeting each other Car1 reaches Y in 10 seconds. In how many seconds does Car 2 reach Q starting from Y?
A.15.5 sec
B.8.4 sec
C.33.6 sec
D.31.11 sec
Answer: D.31.11 sec
Explanation: Q--------------------------------------|----------------------------Y
Car A(20mps)------------------------->P<---------------Car B(15mps)
Let 2 cars meet each other at point P in t seconds.
Car1 covers distance= 20t. Car2 covers distance=15t. So, total distance QY= 35t.
From P, Car 1 reaches onto Y in 10 secs. So it covers 15t further.
so, 15t/20 = 10
So t=40/3 sec and total distance = (35*40)/3
Hence Car2 will cover total distance in (35*40)/(3*15) = 31.11 sec approx.
Answer D
Question: If, in a baseball game, a single picher can decide to throw either a 100mph fastball or 60 mph knuckleball on any pitch, how much less time, in seconds, does the batter have from when the ball is released as a fastball than when the ball is released as a knuckle ball? (Assume where the batter's point of contact is exactly 60ft away from the pitcher's release point. 5280 ft = 1 mile.)
A.6/22s
B.7/22s
C.8/22s
D.9/22s
Answer: A.6/22s
Explanation: One conversion to know is = 1 mile = 5280 ft
Time taken for fastball = (60 / (100 * 5280)) * 60 * 60 = 9/22
Time taken for knuckle ball = (60 / (60 * 5280)) * 60 * 60 = 15/22
Qn is the difference between the time taken by the two balls => 15/22 - 9/22 = 6/22
Option A
Question: It takes 8 high school students, working at identical constant individual rates, 10 hours to paint a certain house. At what time will the house be fully painted if 8 students start painting at 9:00 am and one student, working at the same rate, is added per hour starting at 5:00 pm?
A.6:06 pm
B.6:12 pm
C.6:24 pm
D.6:42 pm
Answer: D.6:42 pm
Explanation: Each student paints at a rate of 1/80 of the house per hour.
In 8 hours, the 8 students can paint 64/80 of the house.
From 5 pm to 6 pm, 9 students paint another 9/80 for a total of 73/80.
10 students can paint the remaining 7/80 of the house in 7/10 of an hour = 42 minutes.
The house is completed at 6:42 pm.
The answer is D.
Question: A cylindrical can has a radius of 3 centimeters and a height of 12 centimeters. What is the area, in square centimeters, of a rectangular label that completely covers the curved surface of the can without over-lapping?
A.16 pi
B.72 pi
C.96 pi
D.192 pi
Answer: B.72 pi
Explanation: They are asking the lateral surface area of the cylinder.
the Lateral surface area = 2* pi * r *h
= 2*pi*3*12=72 pi
Answer is B.
Question: What profit percent is made by selling an article at a certain price, if by selling at 1/3rd of that price, there would be a loss of 20%?
A.140%
B.29%
C.70%
D.27%
Answer: A.140%
Explanation: SP2 = 1/3 SP1
CP = 100
SP2 = 80
1/3 SP1 = 80
SP1 = 240
100 --- 240 => 140%
Answer: A
Question: Firm A's revenues are described by the equation Ra = 15.12x and its costs by Ca = 12.87x + 2400.
Firm B's revenues are described by the equation Rb = 13.27x and its costs by Cb = 8.77x + 1500.
(x denotes the quantity of sales).
If A's volume of sales increases from 1000 to 2000 over the same period that B's volume increases from 2000 to 3000, the percent increase in profits for the firm with the biggest dollar increase in profits is
A.20%
B.30%
C.60%
D.50%
Answer: D.50%
Explanation: Ok, I do not know whether it is exactly what you want to hear but I did it that way: first look at difference between revenue and variable cost => take the bigger one (b) which gives you: 4.5x-1500 just plug in 2000 and 3000. you get 7500 and 12000 (difference 4500). 4500> 0.5*7500 so 50%
D
Question: In a graduating class, the difference between the highest and lowest salaries is $100,000. The median salary is $50,000 higher than the lowest salary and the average salary is $20,000 higher than the median. What is the minimum number of students E in the class?
A.A)10
B.B)12
C.C)15
D.D)20
Answer: C.C)15
Explanation: the difference between the highest and lowest salaries is $100,000.
So there are at least 2 people - say one with salary 0 and the other with 100k. No salary will be outside this range.
Median = 50k more than lowest. So median is right in the center of lowest and highest since lowest and highest differ by 100k. In our example, median = 50k. Since there are more than 2 people, there would probably be a person at 50k.
Mean = 20k more than median so in our example, mean salary = 70k
On the number line,
0........50k (median)........100k
Mean = 70k
So there must be people more toward 100k to bring the mean up to 70k. Since we want to add minimum people, we will add people at 100k to quickly make up the right side deficit. 0 and 50k are (70k + 20k) = 90k away from 70k. 100k is 30k away from 70k. To bring the mean to 70k, we will add two people at 100k each to get:
0....50k.....100k, 100k, 100k
But when we add more people to the right of 70k, the median will shift to the right. We need to keep the median at 50k. So every time we add people to the right of 70k, we need to add people at 50k too to balance the median. 50k is 20k less than 70k while 100k is 30k more than 70k. To keep the mean same, we need to add 2 people at 100k for every 3 people we add at 50k. So if we add 3 people at 50k and 2 people at 100k, we get:
0, ... 50k, 50k, 50k, 50k, ... 100k, 100k, 100k, 100k, 100k
the median is not at 50k yet.
Add another 3 people at 50k and another 2 at 100k to get
0, 50k, 50k, 50k, 50k, 50k, 50k, 50k, 100k, 100k, 100k, 100k, 100k, 100k, 100k
Now the median is 50k and mean is 70k.
Total number of people is 15.
Answer (C)
Question: A man can row 8.4 kmph in still water and he finds that it takes him twice as long to row up as to row down the river. Find the rate of stream.
A.2.8 km/hr
B.12.5 km/hr
C.1 2.6 km/hr
D.22.5 km/hr
Answer: A.2.8 km/hr
Explanation: Given that, time taken to travel upstream = 2 × time taken to travel downstream
When distance is constant, speed is inversely proportional to the time
Hence, 2 × speed upstream = speed downstream
Let speed upstream = x
Then speed downstream = 2x
we have, 1/2(x+2x) = speed in still water
⇒1/2(3x)=8.4
3x = 16.8
x = 5.6
i.e., speed upstream = 5.6 km/hr
Rate of stream = 1/2(2x−x)=x/2=5.6/2=2.8 km/hr
Answer is A
Question: A train passes a station platform in 36 sec and a man standing on the platform in 23 sec. If the speed of the train is 54 km/hr. What is the length of the platform?
A.288
B.195
C.881
D.1277
Answer: B.195
Explanation: Speed = 54 * 5/18 = 15 m/sec.
Length of the train = 15 * 23 = 345 m.
Let the length of the platform be x m . Then,
(x + 345)/36 = 15 => x = 195 m.
Answer: B
Question: What is the units digit of the product of the first 3 primes?
A.1
B.3
C.6
D.0
Answer: C.6
Explanation: 1*2*3 =6
Answer : C
Question: If 5 < x < 9 and y = x + 7, what is the greatest possible integer value of x + y?
A.21
B.22
C.23
D.24
Answer: D.24
Explanation: x+y = x+x+7 = 2x+7
We need to maximize this value and it needs to be an integer.
2x is an integer when the decimal of x is .0 or .5
The largest such value is 8.5
Then x+y = 8.5 + 15.5 = 24.
The answer is D.
Question: Three persons invested Rs.9000 in a joint business. The second person invested Rs.1000 more than the first and the third Rs.1000 more than second. After two years, they gained Rs.4500. How much third person will get?
A.2400
B.2429
C.2980
D.2000
Answer: D.2000
Explanation: First persons investment = x
Second persons investment = x + 1000
Third persons investments = x + 2000
x + x + 1000 + x + 2000 = 9000
3x = 6000
x = 2000
Ratio = 2000 : 3000 : 4000
2:3:4
4/9 * 4500 = 2000
Answer:D
Question: A river 3m deep and 32 m wide is flowing at the rate of 2 kmph the amount of water that runs into the sea per minute is?
A.4500
B.3200
C.3400
D.2761
Answer: B.3200
Explanation: (2000 * 3 * 32)/60
= 3200 M3
Answer:B
Question: A batsman scored 140 runs which included 3 boundaries and 8 sixes. What percent of his total score did he make by running between the wickets?
A.50%
B.40%
C.60%
D.57%
Answer: D.57%
Explanation: Number of runs made by running = 140 - (3 x 4 + 8 x 6)
= 140 - (60)
= 80
Now, we need to calculate 80 is what percent of 140.
=> 80/140 x 100 = 57 %
ANSWER:D
Question: In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate in the remaining 40 overs to reach the target of 282 runs?
A.6.25
B.6.28
C.6.11
D.6.19
Answer: A.6.25
Explanation: Required run rate
= [282 - (3.2 * 10)]/40
= 250/40
= 6.25
Answer:A
Question: A train running at the speed of 60 km/hr crosses a pole in 15 sec. What is the length of the train?
A.535 m
B.178 m
C.250 m
D.168 m
Answer: C.250 m
Explanation: Speed = 60 * 5/18
= 50/3 m/sec
Length of the train
= speed * time
= 50/3 * 15
= 250 m
Answer:C
Question: What will come in place of the x in the following Number series? 46080, 3840, 384, 48, 8, 2, x
A.1
B.9
C.12
D.14
Answer: A.1
Explanation: 46080 /12 = 3840
3840 /10 = 384
384 /8 = 48
48 /6 = 8
8/4 = 2
2 /2 = 1
A
Question: Reena took a loan of $. 1200 with simple interest for as many years as the rate of interest. If she paid $ 432 as interest at the end of the loan period, what was the rate of interest?
A.3.6
B.6
C.18
D.Cannot be determined
Answer: B.6
Explanation: Let rate = R% and time = R years.
Then,1200 x R x R/100= 432
12R2 = 432
R2 = 36
R = 6.
Answer:B
Question: What will be the compound interest on Rs. 40000 after 3 years at the rate of 12 % per annum
A.Rs 16123.20
B.Rs 16123.30
C.Rs 16197.12
D.Rs 16123.50
Answer: C.Rs 16197.12
Explanation: Explanation:
(40000×(1+12/100)3)
=>40000×28/25×28/25×28/25
=>56197.12
So Compound interest will be 56197.12 - 40000
= Rs 16197.12
Option C
Question: Every disk in a bag is either blue, yellow or green. The ratio of blue disks to yellow disks to green disks in this bag is 3 : 7 : 8. If the total number of disks in the bag is 72, how many more green disks than blue disks are in the bag?
A.20
B.28
C.30
D.35
Answer: A.20
Explanation: Let B:Y:G = 3x:7x:8x.
3x + 7x + 8x = 18x = 72 --> x= 4.
G - B = 8x - 3x = 5x = 20.
The answer is A.
Question: How much is 90% of 40 is greater than 4/5 of 25?
A.22
B.16
C.88
D.12
Answer: B.16
Explanation: (90/100) * 40 – (4/5) * 25
= 16
Answer: B
Question: If a two-digit positive integer has its digits reversed, the resulting integer differs from the original by 45. By how much do the two digits differ?
A. 3
B. 4
C. 5
D. 6
Answer: C. 5
Explanation: Given that (10a + b) - (10b + a) = 45 --> 9a - 9b =45 --> a - b = 5.
Answer: C.
Question: On Monday, Lou drives his vehicle with 27-inch tires, averaging x miles per hour. On Tuesday, Lou switches the tires on his vehicle to 32-inch tires yet drives to work at the same average speed as on Monday. What is the percent change from Monday to Tuesday in the average number of revolutions that Lou's tires make per second?
A.Decrease by 14.3%
B.Decrease by 16%
C.Increase by 14.3%
D.Increase by 12.5%
Answer: B.Decrease by 16%
Explanation: 864 is the LCM
On Tuesday 864/32 =27
On Monday 864/27 = 32
Therefore, 27-32/32 = -1/6=-16% decrease
Answer is B