RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period?
A.50%
B.100%
C.150%
D.200%
Answer: C.150%
Explanation: Soln;-
30∗24−12∗24/12∗24=30−12/12=18/1230∗24−12∗24/12∗24=30−12/12=18/12
So 150%, Answer is C.
Question: Set A consists of all the prime numbers between 12 and 32. What is the range of set A?
A.12
B.18
C.16.6
D.17
Answer: B.18
Explanation: The range of a set of data is the difference between the highest and lowest values in the set
In this set,
Highest number = 31
Lowest number = 13
Range = Highest - Lowest = 31 - 13 = 18
Option B
Question: 12.5 * 3.2 * 6.8 = ?
A.352
B.272
C.224
D.646
Answer: B.272
Explanation: B
272
? = 12.5 * 3.2 * 6.8 = 352
Question: By how much is three-fifth of 250 greater than four- seventh of 210 ?
A.30
B.110
C.25
D.None of these
Answer: A.30
Explanation: Solution
3/5of 250 - 4/7of 210 = 60.
Answer A
Question: Rs. 1300 is divided into three parts A, B and C. How much A is more than C if their ratio is 1/2:1/3:1/4?
A.187
B.187
C.300
D.176
Answer: C.300
Explanation: 1/2:1/3:1/4
= 6:4:3
3/13*1300
= 300
Answer: C
Question: One robot builds a robot in 1 hour, another one builds a robot in 2 hours. The 2 robots work together and when a new robot is complete, it joins the others, working at a constant rate of one robot in 2 hours. How much time will it take until there are 3 robots altogether, if the robots build only one robot at a time?
A.40 min
B.94 min
C.110 min
D.112 min
Answer: A.40 min
Explanation: First the 2 robots work at the rate of
1 + 1/2 = 3/2
so they complete one robot in 2/3 rd of an hour = 40 minutes - (1)
And now we have 3 robots in 40 minutes
Answer -A
Question: In a mayoral election, Candidate X received 1/3 more votes than candidate Y, and Candidate Y received 1/7 fewer votes than Z. If Z received 21,000 votes how many votes did candidate X received?
A.18000
B.22000
C.24000
D.26000
Answer: C.24000
Explanation: Z=21 --> Y received 1/7 fewer votes than Z --> Y=Z-1/7*Z=18;
X received 1/3 more votes than Y --> X=Y+1/3*Y=24.
Answer: C.
Question: There are n cities. What is the number of airlines that connected 4 different cities (airline from city A to city B is different with airline from city B to city A)?
A.n(n-1)
B.n(n-3)
C.n(n-1)/2
D.n(n+1)/2
Answer: B.n(n-3)
Explanation: First of all, the possible number of airlines is n. Then, the possible number of airlines departing from one city to another becomes (n-3). Hence, the answer is n(n-3), which makes A an answer choice.
B
Question: 3x^2-6x+3 = 0 Find the above equation find the value of x
A.0
B.1
C.2
D.4
Answer: B.1
Explanation: a = 3, b = -6, c = 3
x1,2 = (6 ± √( (-6)2 - 4×3×3)) / (2×3) = (6 ± √(36-36)) / 6 = (6 ± 0) / 6
x1 = x2 = 1
B
Question: A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 36 years now, the son's age five years back was:
A.13
B.17
C.19
D.22
Answer: A.13
Explanation: Let the son's present age be x years. Then, (36 - x) = x
2x = 36.
x = 18.
Son's age 5 years back (18 - 5) = 13 years.
answer :A
Question: If 6 (A's capital) = 8 (B's capital) = 10 (C's capital). Then the ratio of their capitals is?
A.20:15:15
B.20:15:10
C.20:15:12
D.20:15:11
Answer: C.20:15:12
Explanation: 6A = 8B = 10 C
A:B:C = 1/6:1/8:1/10
= 20:15:12.Answer: C
Question: Three numbers A,B,Care in ratio 1:2:3. Their average is 600. If A is increased by 10% and B is increased by 20%, then to get the average increased by 5%, C will increased by:
A.90
B.100
C.150
D.180
Answer: D.180
Explanation: Let be A= x, B=2x, and C=3x.
(x+2x+3x)/3=600
this will be x=300
so, the numbers will be 300,600,900
new average= 105%of 600= 630
Let 110% of 300+80% of 600 + y= 630*3
solve it for y, you will get, y=1080
so, increase in C= 1080-900 =180 ans
ANSWER:D
Question: Look at this series: 83, 73, 93, 63, __, 93, 43, ... What number should fill the blank?
A.33
B.53
C.73
D.93
Answer: B.53
Explanation: Explanation: This is a simple subtraction series in which a random number, 93, is interpolated as every third number. In the subtraction series, 10 is subtracted from each number to arrive at the next.
Answer: Option B
Question: A boy has eight trousers and 12 shirts. In how many different ways can he select a trouser and a shirt?
A.88
B.96
C.106
D.108
Answer: B.96
Explanation: Explanation:
The boy can select one trouser in eight ways.
The boy can select one shirt in 12 ways.
The number of ways in which he can select one trouser and one shirt is 8 * 12 = 96 ways
B)
Question: How many numbers from 10 to 31 are exactly divisible by 3?
A.13
B.15
C.16
D.7
Answer: D.7
Explanation: 12, 15, 18, 21, 24, 27, 30.
7 Numbers.
10/3 = 3 and 31/3 = 10 ==> 10 - 3 = 7. Therefore 7 digits
D)
Question: Kim purchased n items from a catalog for $5 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.6n + 2
D.6n + 3
Answer: C.6n + 2
Explanation: its C
n items for $5 each
total price $5n
postage and handling of $3 for 1st item and $1 for the rest
total postage and handling = $ [3+ (n-1)]
= $ n+2
total cost
5n+n+2 = 6n+2
Question: A bag contains 9 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is
A.8/17
B.2/5
C.3/5
D.11/15
Answer: A.8/17
Explanation: Drawing two balls of same color from nine green balls can be done in 9C₂ ways.
Similarly from eight white balls two can be drawn in ⁸C₂ ways.
P = 9C₂/¹⁵C₂ + ⁸C₂/¹⁵C₂ = 8/17
ANSWER:A
Question: A certain office supply store stocks 2 sizes of self-stick notepads, each in 3 colors: Blue, Green, Yellow Or Pink. The store packs the notepads in packages that contain either 3 notepads of the same size and the same color or 3 notepads of the same size and of 3 different colors. If the order in which the colors are packed is not considered, how many different packages of the types described above are possible?
A.6
B.8
C.16
D.24
Answer: B.8
Explanation: Notepads of the same color = 3 (we have 3 colors). As we have two sizes then total for the same color=3*2=6
Notepads of the different colors = 3C3=1 (we should choose 3 different colors out of 4). As we have two sizes then total for the different color=1*2=2
Total=6+2=8
Answer: B.
Question: What amount does Kiran get if he invests Rs.8000 at 10% p.a. compound interest for two years, compounding done annually?
A.2999
B.2787
C.2097
D.9680
Answer: D.9680
Explanation: A= P{1 + R/100}n
=> 8000{1 + 10/100}2
= Rs.9680
Answer: D
Question: A reduction of 48% in the price of bananas would enable a man to obtain 64 more for Rs.40, what is reduced price per dozen?
A.2.6
B.8.6
C.7.6
D.3.6
Answer: D.3.6
Explanation: Explanation:
40*(48/100) = 19.2 --- 64
? --- 12 => Rs.3.6
Answer: D
Question: The average of three consecutive odd numbers is 14 more than one-third of the first of these numbers, what is the last of these numbers?
A.17
B.19
C.15
D.Data inadequate
Answer: D.Data inadequate
Explanation: Let the three consecutive odd numbers be
x – 2, x, x + 2 respectively.
According to question,
x=x−2/3+14
∴ 3x – x + 2 = 42 ⇒ 2x = 40
∴ x = 20 = an even number, which goes against our supposition.
Answer D
Question: A bag contains eight white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color?
A.5/8
B.16/33
C.25/63
D.15/33
Answer: B.16/33
Explanation: Two balls can be picked from twelve balls in 12Câ‚‚ ways.
We select one white ball and one red ball from five white balls and four red balls. This can be done âµ ways.
The required probability = (8 * 4) = 32/66 = 16/33
Answer: B
Question: If all 6 are replaced by 9,the algebric sum of all numbers from 1 to 100 (both inclusive)varies by,
A.980
B.330
C.660
D.990
Answer: B.330
Explanation: 6,16,26,36,46,56,76,86,96 replace by 9 then 3*9=27
60,61,62,63,64,65,66,67,68,69 then increase by 30 i.e, 30*10=300+3
99-66=33-30
It will be 330
ANSWER:B
Question: A small family consisting of 4 ( father , mother , son , daughter ) goes to a photo studio . Father says to the photographer , " I need all the possible photographs of our family " . how many pictures can he take , such that at least one person should be there in the photo
A.61
B.62
C.63
D.64
Answer: D.64
Explanation: 4C1+4C2+4C3+4C4=15.
If their positions also takes into consideration then the ans will be 64
ANSWER:D
Question: A started a business with Rs.21,000 and is joined afterwards by B with Rs.36,000. After how many months did B join if the profits at the end of the year are divided equally?
A.3
B.4
C.5
D.6
Answer: C.5
Explanation: Solution
Suppose B joined after x months.
Then,	21000×12=36000×(12 - x)
‹=›36x=180
= x= 5.
Answer C
Question: When a=3+(2/3) and b=3-(2/3), (2^a^2)/(2^b^2)=?
A.256
B.156
C.250
D.150
Answer: A.256
Explanation: --> (2^a^2)/(2^b^2) ={(2)^(a^2-b^2)}=2^(a-b)(a+b). Since a-b=4/3 and a+b=6, 2^(a-b)(a+b)=2^(4/3)(6)=2^8=256
Therefore, the answer is A
Question: If A,B,C,D,E,F,G,H,I,J are in an increasing Arithmetic Progression as such. Then Which of the following operations will result in either mean or the median being modified.
A) A is removed
B) A and J are removed
C) B and I are removed
D) A,B,C,H,I,J are removed
E) A and E are removed
A.A and B
B.A and E
C.A,C,E
D.All of them
Answer: B.A and E
Explanation: There are 10 equidistant numbers on the number line.
Mean and median will be the average of middle two numbers.
If you remove two numbers which is equidistant from either extreme (e.g. B and I), the total deviation on either side of the mean stays the same so mean stays the same. Also, the median is still the average of middle two numbers.
Here answer will be (B).
Question: It takes David 30 minutes to walk to the car park and 60 to drive to work. At what time should he get out of the house in order to get to work at 9:00 a.m.?
A.7:30 a.m
B.5:50 a.m
C.7:50 a.m
D.6:50 a.m
Answer: A.7:30 a.m
Explanation: The time it takes David to get to work: time to walk to car park + time to drive
30 + 60 = 90 minutes = 1 hour and 30 minutes
David needs to get out of the house 1 hour and 30 minutes before 9:00 am at
9:00 - 1:30 = 7:30 a.m
correct answer A
Question: If you cut a 16ft piece of wood into two pieces making one piece 4ft longer than the other. What size is the smaller piece?
A.4ft
B.6ft
C.8ft
D.10ft
Answer: B.6ft
Explanation: Total length is 16ft, one piece is 4ft longer (x+4), leaving the other piece to figure out (x).
(x)+ (x+4)=16
x+x+4-4=16-4
2x=12
2x/2=12/2
x=6
The piece is B) 6ft.
Question: From an island, it is possible to reach the mainland by either Ferry P or Ferry Q. Ferry P travels for 3 hours at 8 kilometers per hour, while Ferry Q takes a route that is two times longer. If Ferry P is slower than Ferry Q by 4 kilometers per hour, how many hours longer is the journey of Ferry Q compared with the journey of Ferry P?
A.1
B.2
C.3
D.4
Answer: A.1
Explanation: The distance traveled by Ferry P is 24 km.
Then the distance traveled by Ferry Q is 48 km. Ferry Q travels at a speed of 12 kph. The time of the journey for Ferry Q is 48/12 = 4 hours, which is 1 hour more than Ferry P. The answer is A.
Question: Harry started a 4-mile hike with a full 10-cup canteen of water and finished the hike in 2 hours with 2 cup of water remaining in the canteen. If the canteen leaked at the rate of 1 cup per hour and Harry drank 3 cups of water during the last mile, how many cups did he drink per mile during the first 3 miles of the hike?
A.1/3
B.2/3
C.3/3
D.3/1
Answer: C.3/3
Explanation: No of cups leaked during the trip = 2 cups.
No of cups Harry drank = 6 cups.
No of cups harry drank during the first 3 miles = 3.
drink / mile = 3/3
Answer: C
Question: Difference between the length &breadth of a rectangle is 23 m. If its perimeter is 206 m, then its area is?? We have: (l - b) = 23 and 2(l + b) = 206 or (l + b) = 103?
A.2230 m^2
B.2456 m^2
C.2520 m^2
D.2678 m^2
Answer: C.2520 m^2
Explanation: Solving the two equations, we get: l = 63 and b = 40.
Area = (l x b) = (63 x 40) m2 = 2520 m^2
C
Question: It takes 6 beavers 10 hours to build a certain dam, working at a uniform rate. If six beavers start to build the same dam at noon, and one beaver per hour is added beginning at 5:00 PM, at what time will the dam be complete?
A.7:24 PM
B.8:00 PM
C.8:36 PM
D.9:12 PM
Answer: C.8:36 PM
Explanation: The rate of 1 beaver is 1/60.
The amount of work done by 6 beavers in 5 hours is 6/60 *5 = 30/60
In the next hour, 7 beavers do 7/60 for a total of 37/60.
In the next hour, 8 beavers do 8/60 for a total of 45/60.
In the next hour, 9 beavers do 9/60 for a total of 54/60.
In the next 36 minutes, 10 beavers do 10/60 * 36/60 = 6/60 for a total of 60/60.
The dam will be completed at 8:36 pm.
The answer is C.
Question: If q and y are integers and (15^q + 15^(q+1))/4^y = 15^y what is the value of q?
A.2
B.3
C.4
D.5
Answer: A.2
Explanation: \frac{15^q( 1+ 15)}{4^y} = 15^y
(15^q . 4^2 ) / 4^y = 15^y. 4^0
15^q . 4^(2-y) = 15^y. 4^0
Equating the powers, q = y; 2-y = 0; So q = y = 2=A
Question: Lamp A flashes every 6 seconds, Lamp B flashes every 8 seconds, Lamp C flashes every 10 seconds. At a certain instant of time all three lamps flash simultaneously. During the period of 4 minutes after that how many times will exactly two lamps flash? (Please include any flash of exactly two lights which occurs at the 4 minute mark.)
A.16
B.17
C.18
D.19
Answer: C.18
Explanation: 4 minutes is 240 seconds.
Lamp A and Lamp B will flash together every 24 seconds.
240/24=10.
In the time period, Lamp A and Lamp B will flash together 10 times.
Lamp A and Lamp C will flash together every 30 seconds.
240/30=8.
In the time period, Lamp A and Lamp C will flash together 8 times.
Lamp B and Lamp C will flash together every 40 seconds.
240/40=6.
In the time period, Lamp B and Lamp C will flash together 6 times.
All three lights will flash together every 2*2*2*3*5=120 seconds.
240/120=2.
We have counted these triple flashes three times, so we need to subtract three times the number of times that all three lights flash together.
The number of times that exactly two lights flash together is 10+8+6-6=18 times.
The answer is C.
Question: Average expenditure of a person for the first 3 days of a week is Rs. 360 and for the next 4 days is Rs. 420. Average expenditure of the man for the whole week is:
A.350
B.370
C.390
D.400
Answer: D.400
Explanation: Explanation:
Assumed mean = Rs. 360
Total excess than assumed mean = 4 × (Rs. 420 - Rs. 350) = Rs. 280
Therefore, Increase in average expenditure = Rs. 280/7 = Rs. 40
Therefore, Average expenditure for 7 days = Rs. 360 + Rs. 40 = Rs. 400
Correct Option: D
Question: In how many ways can the letters of the word SITO be arranged in a row so that the vowels appear in alphabetic order?
A.16
B.12
C.14
D.18
Answer: B.12
Explanation: two letters can be arranged in 2! ways.
only one combination IO is required.
4 letters can be arranged in 4! ways.
thus 4!/ 2! * 1 = 12.
B
Question: The speed of a boat in still water in 22 km/hr and the rate of current is 4 km/hr. The distance travelled downstream in 24 minutes is:
A.10.4 km
B.10.6 km
C.11.4 km
D.11 km
Answer: A.10.4 km
Explanation: Explanation:
Speed downstream = (22 + 4) = 26 kmph
Time = 24 minutes = 24/60 hour = 2/5 hour
Distance travelled = Time × speed = (2/5)×26 = 10.4 km
Answer: Option A
Question: Steve traveled the first 2 hours of his journey at 50 mph and the remaining 3 hours of his journey at 80 mph. What is his average speed for the entire journey?
A.68 mph
B.56.67 mph
C.53.33 mph
D.64 mph
Answer: A.68 mph
Explanation: Distance traveled in 2 hours = 2 * 50 = 100 m
Distance traveled in 3 hours = 3 * 80 = 240m
Total distance covered = 240 + 100 = 340m
Total time = 2 + 3 =5 h
Hence avg speed = total distance covered / total time taken
= 340/5 = 68mph
Answer: A
Question: Sandy walked 25 meters towards south. Then Sandy turned to her left and walked 20 meters. She then turned to her left and walked 25 meters. She then turned to her right and walked 12 meters. What distance is she from the starting point and in which direction?
A.32 meters East
B.32 meters North
C.32 meters West
D.42 meters East
Answer: A.32 meters East
Explanation: The net distance is 20 + 12 = 32 meters to the east.
The answer is A.
Question: If 20% of a number, then 120% of that number will be?
A.20
B.120
C.360
D.720
Answer: D.720
Explanation: Explanation:
Let the number x. Then,
20% of x = 120
x = (120 * 100)/20 = 600
120% of x = (120/100 * 600) = 720.
Answer IS D
Question: Felix earned 80% more per month than Oscar. If Felix’s salary is decreased 10% and Oscar’s salary is increased by 10%, then Felix would be earning what percent more than Oscar?
A.10%
B.9.09%
C.48%
D.47.27%
Answer: D.47.27%
Explanation: This Q is all about taking the correct BASE for taking %s..
the very first step requires taking some numbers for each..
ONE should be 100...
it is easy to take 20 and 100 here..
but the BASE is 100 here, so the salary can be 100 and 180..
100 increases 10% =110..
180 decreases 10%=162..
so the increase is 52..
again the BASE is 110, so answer 52/110 * 100= 47.27% D
without calculations,
answer cannot be equal to or greater than 48, as 52 is on 110..
so D is the only one left
Question: In a game of chess, the moves of whites and blacks alternate with whites having the first move. During a certain chess tournament whites have made 2319 moves altogether while blacks have made 2315 moves. If in any game the side that made the last move did not lose, which of the following can be true about the tournament?
I. Blacks lost 5 games
II. Blacks won more games than whites
III. All games ended in a draw
A.III only
B.I and II only
C.I and III only
D.II and III only
Answer: D.II and III only
Explanation: if white wins, white will always have more moves than black.
Win: White. Then, White > Black.
If Black wins, the number of moves of both white and black will be the same.
Win: Black. Then, White (moves) = Black (moves).
Why? Because, white cannot have the last move and lose the game (from the question). And white always starts so it will be WB WB WB till blacks last move.
If it is a draw, either of these possibilities exists.
Win: Draw. White > Black or Black = White.
Statement 1: Black lost 5 games. This is false because anyone who plays the last move cannot lose (from the question). IF black lost 5 games, white will have a clear lead of 5 moves. It is only 4 moves from the question.
Statement 2: This is possible. Imagine that they play about 150 games. 146 could be black wins (So black moves will be equal to white). then last 4 can be White wins (White moves > Black moves).
Statement 3: All games are draws with white having the last move in only 4 of them . Possible
the answer is D
Question: How many positive integers less than 50 have a reminder 5 when divided by 7?
A.3
B.7
C.4
D.5
Answer: B.7
Explanation: take the multiples of 7 and add 5
0X7+5=5 ....6X7+5=47
there are 7 numbers
answer B
Question: The cost of 3 kg of sugar is $30. What will the cost of 8 kg of sugar be?
A.20
B.40
C.80
D.160
Answer: C.80
Explanation: 3 kg costs $30
1 kg costs $10
8 kg costs $80
The answer is C.
Question: In the coordinate plane, points (x, 2) and (8, y) are on line k. If line k passes through the origin and has slope 1/2, then x + y =
A.8
B.6
C.5
D.3
Answer: A.8
Explanation: Line k passes through the origin and has slope 1/2 means that its equation is y=1/2*x.
Thus: (x, 2)=(4, 2) and (8, y) = (8,4) --> x+y=4+4=8.
Answer: A
Question: The ratio 6 : 5 expressed as a percent equals
A.12.5%
B.40%
C.120%
D.125%
Answer: C.120%
Explanation: Solution
6 : 5	= 6/ 5
= (6/5 x 100)%.
= 120 %.
Answer C
Question: If an article is sold at 19% profit instead of 12% profit, then the profit would be Rs. 105 more. What is the cost price?
A.Rs.1529
B.Rs.1508
C.Rs.1500
D.Rs.1592
Answer: C.Rs.1500
Explanation: Let the cost price of an article be Rs. x.
(19% of x) - (12% of x) = 105
19x/100 - 12x/100 = 105 => 7x = 105 * 100
=> x = 1500
Cost price = Rs.1500
Answer: C
Question: How much more would Rs.20000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
A.482
B.226
C.276
D.266
Answer: A.482
Explanation: Explanation:
20000(11/10)4 - 20000(6/5)2
= 482
Answer: A
Question: Last year a certain bond yielded 8 percent of its face value in interest. If that interest was approximately 4 percent of the bonds selling price of $7,500, what is the bonds face value?
A.$6,000
B.$3,750
C.$7,425
D.$7,500
Answer: B.$3,750
Explanation: Interest = 0.08*face value = 0.04*7,500 --> face value = 0.04*7,500/0.08 = 3,750.
Answer: B.
Question: The width of a rectangular hall is ½ of its length. If the area of the hall is 128 sq.m, what is the difference between its length and breadth?
A.8m
B.10m
C.12m
D.15m
Answer: A.8m
Explanation: Let the length of the hall be x m
Breadth of the hall = 1x/2 m
Area of the hall = Length * Breadth
128 = x * 1x/2
x² = 256
x =16
Difference between the length and breadth of the hall = x - 1x/2 = x/2
=16/2 = 8m
ANSWER:A
Question: find out the probability to get 1Rs coin head, 2Rs coin Tail and 5Rs coin head??
A.1/2
B.1/8
C.1/16
D.1/4
Answer: B.1/8
Explanation: 1Rs coin head=1/2
2Rs coin Tail=1/2
5Rs coin head=1/2
=(1/2)*(1/2)*(1/2)
=1/8
ANSWER:B
Question: At Didymus Corporation, there are just two classes of employees: silver and gold. The average salary of gold employees is $48,000 higher than that of silver employees. If there are 120 silver employees and 160 gold employees, then the average salary for the company is how much higher than the average salary for the silver employees?
A.$24,000
B.$28,000
C.$32,000
D.$36,000
Answer: A.$24,000
Explanation: The answer should be -> A. $24,000
Question: The average weight of 4 person's increases by 8.5 kg when a new person comes in place of one of them weighing 95 kg. What might be the weight of the new person?
A.129 kg
B.134 kg
C.180 kg
D.185 kg
Answer: A.129 kg
Explanation: Total weight increased = (4 x 8.5) kg = 34 kg.
Weight of new person = (95 + 34) kg = 129 kg
Option A
Question: Tough and Tricky questions: Word Problems.
In a rare coin collection, one in six coins is gold, and all coins are either gold or silver. If 10 silver coins were to be subsequently traded for an additional 10 gold coins, the ratio of gold coins to silver coins would be 1 to 5. Based on this information, how many gold coins would there be in this collection after the proposed trade?
A.50
B.60
C.180
D.200
Answer: D.200
Explanation: The correct answer is D.
Question: Three number are in the ratio 5:6:7. The sum of its largest and smallest numbers equals the sum of the third number and 48. Find the third number?
A.87
B.57
C.48
D.26
Answer: C.48
Explanation: Let the numbers be 5x, 6x and 7x.
Largest number = 7x
Smallest number = 5x
Third number = 6x
7x + 5x = 6x + 48
6x = 48
Third number is: 48.
Answer: C
Question: Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:
A.75
B.81
C.85
D.89
Answer: C.85
Explanation: Since the numbers are co-prime, they contain only 1 as the common factor.
Also, the given two products have the middle number in common.
So, middle number = H.C.F. of 551 and 1073 = 29;
First Number = 551/29 =19
Third Number = 1073/29 =37
Required sum = (19 + 29 + 37) = 85.
ANSWER :C
Question: Find the largest 4 digit number which isexactly divisible by 88?
A.7851
B.8902
C.9944
D.9578
Answer: C.9944
Explanation: Largest 4 digit number is 9999
After doing 9999 ÷ 88 we get remainder 55
Hence largest 4 digit number exactly divisible by 88 = 9999 - 55 = 9944
C