MU-NLPC/Calc-aqua_rat huggingface dataset:
Ayush was born two years after his father's marriage. His mother is five years younger than his father but 20 years older than Ayush who is 10 years old. At what age did the father get married ? Choose the correct choice:
A) 23 years
B) 22 years
C) 67 years
D) 16 years
E) 19 years

Solution: Explanation:   Ayush's present age = 10 years.   His mother's present age = (10 + 20)= 
(10 + 20) = 30
30 years.   Ayush's father's present age= (30 + 5)= 
(30 + 5) = 35
35 years.   Ayush's father's age at the time of Ayush's birth= (35 - 10)= 
(35 - 10) = 25
25 years.   Therefore Ayush's father's age at the time of marriage= (25 - 2)= 
(25 - 2) = 23
23 years.   23 yearsnswer: 23 years) 23 years
Answer: A
City A to city B, John drove for 1 hour at 40 mph and for 3 hours at 60 mph. What was the average speed for the whole trip?  Choose the correct choice from the following.
A) 57 B) 57.5 C) 58.2 D) 59 E) 55

Solution: The total distance is 1×40+3×60=220   And the total time is 4 hours.   Hence,   Average Speed=(Total Distance/Total Time)=220/4= 
220/4 = 55
55   Answer : 55
Answer: E
A man goes from A to B at a speed of 20 kmph and comes back to A at a speed of 30 kmph. Find his average speed for the entire journey?  Pick
A) 20 kmph B) 24 kmph C) 50 kmph D) 35 kmph E) 30 kmph

Solution: Explanation:   Distance from A and B be 'd'   Average Speed = total distance/total time   Average Speed = (2d)/[(d/20) + (d/30)]   = (2d)/[5d/60) => 24 kmph.   ANSWER IS 24 kmph
Answer: B
The Shopkeeper increased the price of a product by 25% so that customer finds it difficult to purchase the required amount. But somehow the customer managed to purchase only 70% of the required amount. What is the net difference in the expenditure on that product?	Choose the correct option:
A) 12.5% B) 13% C) 13.15% D) 14% E) 15%

Solution: Quantity X Rate = Price   1 x 1 = 1   0.7 x 1.25 = 0.875   Decrease in price = (0.125/1) × 100 = 12.5%   12.5%)
Answer: A
The ratio of the volumes of two cubes is 729 : 1331. What is the ratio of their total surface areas?	Options
A) 81 : 121	B) 81 : 127	C) 81 : 191	D) 81 : 161	E) 81 : 182

Solution: Explanation:   Ratio of the sides = ³√729 : ³√1331 = 9 : 11   Ratio of surface areas = 92 : 112 = 81 : 121   81 : 121nswer: Option 81 : 121
Answer: A
In a certain warehouse, 30 percent of the packages weigh less than 75 pounds, and a total of 48 packages weigh less than 25 pounds. If 80 percent of the packages weigh at least 25 pounds, how many of the packages weigh at least 25 pounds but less than 75 pounds?  Options:
A) 8  B) 64  C) 24  D) 102  E) 144

Solution: If 80% of the packages weigh at least 25 pounds   This means that 20% of the packages weigh LESS THAN 25 pounds   Let T = TOTAL number of packages   So, 20% of T = # of packages that weigh LESS THAN 25 pounds   48 packages weigh LESS THAN 25 pounds   GREAT. So, 20% of T = 48   Rewrite to get: 0.2T = 48   Solve:T = 240   30% of the packages weigh less than 75 pounds   So, 30% ofT= number of packages that weigh less than 75 pounds   30% of240=72, so72packages weigh less than 75 pounds   OF THOSE72packages that weigh less than 75 pounds,48packages weigh less than 25 pounds.   So, the number of packages that weight BETWEEN 25 and 75 pounds =72-48= 
72-48 = 24
24= 24
Answer: C
A man can hit a target once in 9 shots. If he fires 4 shots in succession, how many ways that he will hit his target?	Answers
A) 71/2	B) 81/13	C) 81/3	D) 5/8	E) 91/3

Solution: The man will hit the target if he hits it once or twice or thrice or all four times in the four shots that he takes.   So, the only possibility when the man will not hit the target is when he fails to hit the target in even one of the four shots that he takes.   The event of not hitting the target even once is the complement of the event of hitting the target at least once.   The probability that he will not hit the target in any given shot = 1 - 1/9 = 8/9   Therefore, the probability that he will not hit the target in any of the four shots = 8/9^4 = 5/8   5/8
Answer: D
A merchant purchased a jacket for $30 and then determined a selling price that equaled the purchase price of the jacket plus a markup that was 25 percent of the selling price. During a sale, the merchant discounted the selling price by 20 percent and sold the jacket. What was the merchant’s gross profit on this sale?  Choices:
A) $2	B) $3	C) $4	D) $12	E) $15

Solution: Let selling price = x   So, x = 30 + 25x/100   Calculating above, x = 40   Selling price = 40   20% Discount on Selling price = 32   So, profit = 32-30= 
32-30 = 2
2 $2nswer= $2
Answer: A
If 20 men can build a water fountain 56 metres long in 14 days, what length of a similar water fountain can be built by 35 men in 3 days?  Choices:	A) 21 m	B) 24 m	C) 27 m	D) 29 m	E) 30 m

Solution: Explanation :   Let the required length be x metres   More men, More length built (Direct Proportion)   Less days, Less length built (Direct Proportion)   Men 20: 35   Days 14: 3 : : 56 : x   Therefore (20 x 14 x x)=(35 x 3 x 56)   x=(35 x 3 x 56)/280=49   Hence, the required length is 21 m.   21 mnswer : 21 m
Answer: A
A person travels equal distances with speeds of 8 km/hr, 9 km/hr and 10 km/hr and takes a total time of 47 minutes. The total distance is?
Choose the correct choice.
A) 6 km B) 3 km C) 7 km D) 5 km E) 2 km

Solution: Let the total distance be 3x km.   Then, x/8 + x/9 + x/10 = 47/60   x/3 = 47/60 => x = 2.33.   Total distance = 3 * 2.33= 
3 * 2.33 = 6.99
6.99 km.   Answer:7 km
Answer: C
The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent? Choose one
A) 18 2/71%	B) 18 2/11%	C) 18 9/11%	D) 18 2/41%	E) 2 2/11%

Solution: 13 CP = 11 SP   11 --- 2 CP   100 --- ? =>18 2/11%   Answer: 18 2/11%
Answer: B
A man put diesel at Rs.7.50, Rs. 8 and Rs. 8.50 per ltr for three successive years. What approximately is the average cost per ltr of diesel if he spends Rs. 4000 each year? Choose one.
A) Rs. 7.98 B) Rs. 8.45 C) Rs. 8.98 D) Rs. 9.23 E) Rs. 9.86

Solution: Total quantity of diesel   consumed in 3 years   = 4000	+	4000	+	4000 litres   7.50	8	8.50   = 4000 2	+	1	+	2	ltr   15	8	17   = 76700	ltr   51   Total amount spent = Rs. (3 x 4000) = Rs. 12000.   Average cost = Rs. 12000 x 51 = Rs.	6120 = Rs. 7.98   76700	767   Rs. 7.98
Answer: A
The perimeter of a rectangle is 44. The length is 5 less than double the width.
Find the dimensions Choose the correct choice: A) 6 by 10 B) 7 by 11 C) 8 by 12 D) 9 by 13 E) 10 by 14

Solution: Length x Wewillmake the length x   Width 2x−5 Width is five less than two times the length   P =2L+2W The formula for perimeter of a rectangle   (44)=2(x)+2(2x−5) Replace P , L, andW with labeled values   44=2x+4x−10 Distribute through parenthesis   44=6x−10 Combine like terms 2x+4x   +10 +10 Add 10 to both sides   54=6x The variable ismultiplied by 6   6 6 Divide both sides by 6   9=x Our solution for x   Length 9 Replace xwith 9 in the origional list of sides   Width 2(9)−5=13 The dimensions of the rectangle are 9 by 13.   correct answer 9 by 13
Answer: D
If the reciprocals of two consecutive positive integers are added together, what is the sum in terms of the greater integer a?
Choose the correct choice from the following answers
A) (2a-1)/(a^2- a)	B) a/2	C) a^3 (a-1)	D) 2a-1	E) 3a-1

Solution: Let two consecutive positive integers be a and a-1 (Greater integer is a)   So,   (1/a) + [1/(a-1)]   = (2a-1)/a(a-1)   =(2a-1)/(a^2- a)   (2a-1)/(a^2- a)nswer : (2a-1)/(a^2- a)
Answer: A
If R is the least positive integer that is divisible by every integer from 12 to 16 inclusive, then R/13 is = Answers:	A) 40320	B) 21840	C) 1680	D) 840	E) 240

Solution: The integer should be divisible by: 12, 13, 14, 15 and 16, that is 3*2^2, 13, 2*7, 3*5 and 2^4. The least common multiple of these integers is the product of 13, 7, 5, 3 and 2^4. Then, R/13 is (13 * 7 * 5 * 3 * 2^4)/13 = 7*5*3*16= 
7*5*3*16 = 1_680
1680.   Answer: 1680.
Answer: C
The angle between the minute hand and the hour hand of a clock when the time is 8:30
Pick
A) 80 deg
B) 40 deg
C) 35 deg
D) 75 deg
E) 60 deg

Solution: angle traced hr hand 17/2 hrs = 300/12 * 17/2 = 255   angle by min 30 min   (360/60*30)= 
  (360/60*30) = 180
180   req= 255-180= 
255-180 = 75
75   ANSWER 75 deg
Answer: D
On the xy co-ordinate plane, point C is (5,-2) and point D is (-1,3.5). The point on line segment CD that is twice as far from C as from D is: Answers.
A) (1,-1)  B) (1,1)  C) (2,0.25)  D) (3,0.5)  E) (3,1)

Solution: We want the point on the line that is twice as far from C as it is from D. We can examine the x and y coordinates separately since they are independent.   *It should be noted that there are two solutions to this problem, one point between C and D, and another point with D in the middle of C and the point. We can quickly look at the answer choices and see that all the points are between C and D, therefore we can search for that point using the following method:   Taking the x-coordinate first, the distance between C and D is |(x-coordinate of C) - (x-coordinate of D)|= |5 - (-1)= 
5 - (-1) = 6
6   The x-coordinate that is twice as far from C as it is from D (and in between C and D) will be 4 units from C and 2 units from D. So the x coordinate of the point we're looking for is  5-4= 
 5-4 = 1
1, or  (-1)+2= 
 (-1)+2 = 1
1.   Now looking at the y-coordinate, we do the same thing. The distance between C and D is |(-2) - 2.5|= 4.5   The y-coordinate that is twice as far from C as it is from D (and in between C and D) will be 3 units from C and 1.5 units from D. So the y coordinate of the point we're looking for is  (-2)+3= 
 (-2)+3 = 1
1, or  2.5-1.5= 
 2.5-1.5 = 1
1.   So now we have our coordinates of the point on the line that is twice as far from C as it is from (3,0.5): (3,0.5)   Answer: (3,0.5)
Answer: D
I remember during the school days , the teacher asked the class "can you tell me the sum of the first 50 odd numbers ?".
I ran quickly to the teacher and told her "the answer is 2500". The teacher replied "lucky guess".
She then asked me "can you tell me the sum of first 72 odd numbers ?".
I wait for approx 10 seconds and replied with the correct answer.
How can i answer so quickly and whats the correct answer ? Select: A) 8715 B) 0152 C) 3581 D) 5184 E) 9126

Solution: D   5184   n^1   72 * 72 = 5625 (sum of first 72 odd numbers).   50 * 50= 
50 * 50 = 2_500
2500 (sum of first 50 odd numbers).
Answer: D
A certain bacteria colony doubles in size every day for 19 days, at which point it reaches the limit of its habitat and can no longer grow. If two bacteria colonies start growing simultaneously, how many days will it take them to reach the habitat’s limit?
Choose the correct answer:
A) 6.33	B) 7.5	C) 10	D) 18	E) 19

Solution: If there is one bacteria colony, then it will reach the limit of its habitat in 20 days.   If there are two bacteria colonies, then in order to reach the limit of habitat they would need to double one time less than in case with one colony. Thus colonies need to double 18 times.   Answer: D.   Similar questions to practice:   Hope it helps.
Answer: D
If the positive integer x is a multiple of 5/2 and the positive integer y is a multiple of 2, then xy must be a multiple of which of the following?
I. 1
II. 12
III. 5
Choose the correct choice from the following answers.
A) II only
B) I and II only
C) I and III only
D) II and III only
E) I, II, and III

Solution: x=5/2a   y=2b   xy=5ab   where a,b are integers   Hence , xy will always be divisible by 1,5 .   I and III only is the answer.
Answer: C
There are 30 people in anime club. 5 of the people voted to watch Case Closed that day. 10 people voted to watch Skip Beat. 3 people voted to watch My Hero Academia Academia. How many people did not vote if no one voted twice? Choose the correct choice from the following:
A) 5	B) 10	C) 11	D) 12	E) 16

Solution: As the categories do not overlap, you can simply subtract the number of people who voted for each anime from the total number of people in the club:   30-5-10-3= 
  30-5-10-3 = 12
12. As such, the correct answer is 12: 12.
Answer: D
40% of a number is more than 20% of 650 by 190. Find the number?
Answers:	A) 337	B) 279	C) 800	D) 277	E) 771

Solution: (40/100) * X – (20/100) * 650 = 190   2/5 X = 320   X = 800   Answer: 800
Answer: C
Sum of three numbers 274, If the first number be twice then second and third number be one third of the first, then the second number is
Answers:
A) A)70  B) B)71  C) C)75  D) D)73  E) E)74

Solution: Explanation:   Let the second number is x, then first is 2x, and third is 1/3(2x)   =>2x+x+2x/3=274   <=>11x/3=274   =>x=75   Answer: Option 75
Answer: C
A, B and C can do a piece of work in 7 days, 14 days and 28 days respectively. How long will they taken, if all the three work together?	Pick one.
A) 7  B) 4  C) 3  D) 2  E) 1

Solution: 1/7 + 1/14 + 1/28 = 7/28 = 1/4 => 4 days   Answer: 4
Answer: B
If (x/y)=(11/5), find the value (x^2+y^2)/(x^2-y^2) Choose the correct answer:
A) 73/48 B) 59/11 C) 51/77 D) 41/11 E) None of them

Solution: = (x^2+y^2)/(x^2-y^2) = ( x^2 /y^2+ 1)/ ( x^2 /y^2-1) = [(11/5)^2+1] / [(11/5)^2-1]   = [(121/25)+1] / [(121/25)-1] = 73/48   73/48nswer is 73/48.
Answer: A
The parameter of a square is equal to the perimeter of a rectangle of length 16 cm and breadth 12 cm. Find the circumference of a semicircle whose diameter is equal to the side of the square. (Round off your answer to two decimal places) Choose one.
A) 22 cm
B) 47.14 cm
C) 84.92 cm
D) 94.94 cm
E) 23.57 cm

Solution: Let the side of the square be a cm.   Parameter of the rectangle = 2(16 + 12) = 56 cm Parameter of the square = 56 cm   i.e. 4a = 56   22 cm = 14   Diameter of the semicircle = 14 cm   Circimference of the semicircle   = 1/2(∏)(14)   = 1/2(22/7)(14) = 308/14= 
308/14 = 22
22 cm   22 cmNSWER:22 cm
Answer: A
A bus covers a distance of 12 km in 5 min. If it takes 5 sec to pass a telegraph post, then the length of the bus is? Select the correct option: A) 120m B) 180m C) 240m D) 200m E) 280m

Solution: Speed = (12/5 * 60) km/hr = (144 * 5/18) m/sec = 40 m/sec.   Length of the bus = 40 * 5= 
40 * 5 = 200
200 m.   ANSWER:200m
Answer: D
One of the two buses completes a journey of 300 miles in 7 1/2 hours and the other journey of 450 miles in 10 hours. the ratio of their average speed is
Choose the correct option:	A) 2:3	B) 4:5	C) 3:4	D) 8:9	E) 5:6

Solution: 300 miles completed in 7 1/2 hours means 27000 sec   450 miles completed in 10 hours means 36000 sec   speed=distance/time   1st bus speed:2nd bus speed=300/27000:450/36000=10/9:5/4=40:45=8:9   ANSWER:8:9
Answer: D
What number comes next?
482, 693, 714, 826, 937, ?	Select:
A) 113  B) 231  C) 245  D) 148  E) 123

Solution: 148   148   The numbers 48269371 are being repeated in the same sequence.
Answer: D
A seller uses 500gm in place of 1kg to sell his goods. Find his actual % profit or loss, when he sells his article on 10% gain on cost price? Choose the correct choice from the following answers
A) 32.5% B) 37.5% C) 35% D) 40% E) 75%

Solution: Selling price of 500gm = 100+10= 
100+10 = 110
$110   Profit= 110-50= 
110-50 = 60
$60   % of profit= 60*100/80= 
60*100/80 = 75
75 %   Answer is 75%
Answer: E
In a shower, 6 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is:	Choices.
A) 75 cu. m B) 900 cu. m C) 750 cu. m D) 9000 cu. m E) 7.50 cu. m

Solution: 1 hectare = 10000 sq mtr   The volume of water that falls on 1.5 hectares of ground = 0.06*1.5*10000= 
0.06*1.5*10000 = 900
900 cub mtr .   ANSWER:900 cu. m
Answer: B
The forth proportional to 24,8,15 is? Choose the correct choice from the following options.
A) 5
B) 12
C) 18
D) 20
E) 24

Solution: Let the fourth proportional to 24,8,15 be x   then 24:8::15:x   24x = 8*15   x = 5   5nswer is 5
Answer: A
Two trains of length 220 m and 280 m are running towards each other on parallel lines at 42 kmph and 30 kmph respectively. In what time will they be clear of each other from the moment they meet? Choose the correct answer:
A) 28  B) 266  C) 990  D) 25  E) 11

Solution: Relative speed = (42 + 30) * 5/18 = 4 * 5= 
4 * 5 = 20
20 mps.   Distance covered in passing each other= 220 + 280= 
220 + 280 = 500
500 m.   The time required= d/s = 500/20= 
500/20 = 25
25 sec.   Answer: 25
Answer: D
The area of a rectangular plot is 460 square metres. If the length is 15% more than the breadth, what is the breadth of the plot?	Choose the correct option.
A) 14 M  B) 20 M  C) 18 M  D) 12 M  E) 15 M

Solution: L20 M = 460 M2   LET 20 MREATH = 20 M   L = 20 M * (100 + 15)/100 = 11520 M/100   FROM THESE 11520 M/100 * 20 M = 460   20 M2 = 46000/115= 
46000/115 = 400
400   20 M= ROOT OF 400 = 20 M   ANSWER 20 M
Answer: B
In a rectangular coordinate system, what is the area of a rhombus whose vertices have the coordinates (0, 4.5), (8, 0), (0, -4.5), (-8, 0)? Pick one
A) 56  B) 72  C) 112  D) 116  E) 120

Solution: Ares of rhombus= 1/2* D1 *D2   Length of 1st diagonal = 8+8= 
8+8 = 16
16   Length of 2nd diagonal= 4.5+4.5= 
4.5+4.5 = 9
9   Area= 1/2*16*9= 
1/2*16*9 = 72
72   72 is the answer
Answer: B
If 40 people get the chance to pick a card from a canister that contains 5 free passes to an amusement park mixed in with 35 blank cards what is the probability that the 40th person who picks will win?	Choose the correct option.
A) 35/175 B) 36/175 C) 38/175 D) 39/175 E) 40/175

Solution: 35 - lose, 5 - win   Pick 5 people to win => 40C5 = total number of outcomes.   Favorable outcome is : First pick the 40th person, then pick any other 4.   => 1*40C4   So, probability = 40C5 / 40C4   = 40!*36!*4! / (35!*5!*40!)   = 36/(35*5)   = 36 / 175   ANSWER:36/175
Answer: B
If a randomly selected non-negative single digit integer is added to {2, 3, 4, 9}. What is the probability that the median of the set will increase but the range still remains the same?	Choose the correct answer:
A) 0.2
B) 0.3
C) 0.4
D) 0.5
E) 0.6

Solution: We are selecting from non-negative single digit integers, so from {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}. These 10 digits represent the total number of outcomes.   Hence, the total number of outcomes is 10.   We need to find the probability that the median of the set will increase but the range still remains the same.   The median of the set is  (3 + 4)/2= 
 (3 + 4)/2 = 7/2 = around 3.5
3.5, thus the number selected must be 4 or greater.   For the range to remain the same, the number must be between 2 and 9 inclusive.   To satisfy both conditions, the number selected must be 4, 5, 6, 7, 8, or 9.   The probability is  6/10= 
 6/10 = 3/5 = around 0.6
0.6   The answer is 0.6.
Answer: E
A man buys a cycle for Rs. 1200 and sells it at a loss of 10%. What is the selling price of the cycle? Select:
A) s. 1080
B) s. 1140
C) s. 1090
D) s. 1202
E) s. 1092

Solution: S.P. = 90% of Rs. 1200 = Rs.	90	x 1200/100 = Rs. 1080   s. 1080nswer: Option s. 1080
Answer: A
If k and w are the dimensions of a rectangle that has area 20 and if k and w are integers such that k > w, what is the total number of possible values of k?
Options:
A) Two
B) Three
C) Four
D) Five
E) Six

Solution: kw=20=20*1=10*2=5*4--> k can take 3 values,   Answer: Three
Answer: B
A man complete a journey in 40 hours. He travels first half of the journey at the rate of 20 km/hr and second half at the rate of 30 km/hr. Find the total journey in km.  Pick:
A) 960 km	B) 224 km	C) 230 km	D) 232 km	E) 234 km

Solution: 0.5x/20 + 0.5x/30 = 40   --> x/20+ x/30= 80   --> 5x = 60x80   --> x = (60x80)/5 =960 km.   960 kmnswer :960 km
Answer: A
Evaluate:56- 12*3*2 =?	Choose the correct option
A) 42
B) 48
C) 62
D) 72
E) 82

Solution: According to order of operations, 12?3?2 (division and multiplication) is done first from left to right   12**2 = 4* 2= 
4* 2 = 8
8   Hence   56 - 12*3*2= 56- 8= 
56- 8 = 48
48   correct answer 48
Answer: B
A train 360 m long runs with a speed of 45 km/hr. What time will it take to pass a platform of 290 m long? Pick one
A) 38 sec
B) 35 sec
C) 44 sec
D) 40 sec
E) 52 sec

Solution: 52 secxplanation:   Speed = 45 km/hr = 45×(10/36) m/s   = 150/12 = 50/4 = 25/2 m/s   Total distance = length of the train + length of the platform   = 360 + 290= 
360 + 290 = 650
650 meter   Time taken to cross the platform= 650/(25/2) = 650×2/25 = 52 seconds   Answer: Option 52 sec
Answer: E
Find the compound interest on Rs. 10,000 in 2 years at 4% per annum, the interest being compounded half-yearly.	Choices:  A) Rs 824.32  B) Rs 822.32  C) Rs 825  D) Rs 723  E) Rs 624.32

Solution: Principal = Rs. 10000; Rate = 2% per half-year; Time = 2 years = 4 half-years.   Amount =   Rs [10000 * (1+(2/100))4] = Rs(10000 * (51/50) * (51/50) * (51/50) * (51/50))   = Rs. 10824.32.   :. C.I. = Rs. (10824.32 - 10000) = Rs. 824.32.   Rs 824.32NSWER Rs 824.32 Rs 824.32
Answer: A
A company has a job to prepare certain number of cans and there are three machines A, B and C for this job. A can complete the job in 1 day, B can complete the job in 2 days and C can complete the job in 5 days. How many days the company will it take to complete the job if all the machines are used simultaneously? Answers
A) 4 days B) 4/3 days C) 10/17 days D) 12days E) 14 days

Solution: Let the total number of cans to be prepared be 10.   The number of cans prepared by A in 1 day = 10.   The number of cans prepared by B in 1 day = 5.   The number of cans prepared by C in 1 day = 2.   Thus, the total number of cans that can be prepared by all the machines working simultaneously in a single day = 17.   Therefore, the number of days taken to complete the whole work = 10/17 days.   ANSWER:10/17 days
Answer: C
The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for xequal to:	Select the correct option.
A) 0.02  B) 0.2  C) 0.04  D) 0.4  E) None

Solution: EXPLANATION   Given expression = (11.98)2 + (0.02)2 + 11.98 x x.   For the given expression to be a perfect square, we must have   11.98 x x = 2 x 11.98 x 0.02 or x = 0.04   Answer 0.04
Answer: C
If a tire rotates at 400 revolutions per minute when the car is traveling 72km/h, what is the circumference of the tire?
Choose the correct choice from the following options.
A) 7 meters
B) 9 meters
C) 8 meters
D) 5 meters
E) 3 meters

Solution: 400 rev / minute = 400 * 60 rev / 60 minutes   = 24,000 rev / hour   24,000 * C = 72,000 m : C is the circumference   C = 3 meters   correct answer 3 meters
Answer: E
Two sets A and B consists only of positive integers such that mean of set A is 60 . If set R consist of all the elements of both A and B such that mean of R is 80 then the mean of set B is =>
Pick:
A) [A] 65
B) [B] 60
C) [C] 70
D) [D] 55
E) [E] cannot be determined

Solution: For this question, we have zero information about the size of two sets, sets AB. These two sets may have the same size or may be wildly different. Thus, the answer is (E), the mathematical answer cannot be determined. This is a very weak math question. As someone who writes GMAT practice questions, I would give this a grade of anD-as a question.   Answer [E] cannot be determined
Answer: E
What is the least integer that is a sum of four different prime numbers each greater than 40?
Choose the correct choice
A) 178  B) 180  C) 182  D) 184  E) 186

Solution: The sum of the four smallest primes greater than 40 is  41+43+47+53= 
 41+43+47+53 = 184
184.   The answer is 184.
Answer: D
A theater box office sold an average (arithmetic mean) of 68 tickets per staff member to a particular movie. Among the daytime staff, the average number sold per member was 80, and among the evening staff, the average number sold was 60. If there are no other employees, what was the ratio of the number of daytime staff members to the number of evening staff members?  Choose the correct choice from the following options.
A) 2:3	B) 1:4	C) 5:6	D) 7:11	E) 3:7

Solution: Deviation from the mean for the daytime staff = 80 - 68= 
80 - 68 = 12
12.   Deviation from the mean for the evening staff= 68 - 60= 
68 - 60 = 8
8.   Thus, the ratio of the number of daytime staff members to the number of evening staff members is 8:12= 2:3.   The answer is 2:3.
Answer: A
How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 132 m length	Choose one.
A) 12
B) 12.1
C) 13
D) 14
E) 15

Solution: Speed = 72 * 5/18= 
72 * 5/18 = 20
20 m/sec   Total distance covered= 110 + 132= 
110 + 132 = 242
242 m.   Required time= 242/20= 
242/20 = 121/10 = around 12.1
12.1 sec.   Answer: Option 12.1
Answer: B