MU-NLPC/Calc-aqua_rat huggingface dataset:
In what ratio mental A at Rs.68 per kg be mixed with another metal at Rs.96 per kg so that cost of alloy (mixture) is Rs.72 per kg?	Pick one
A) 6:1  B) 4:7  C) 3:7  D) 9:5  E) 9:8

Solution: (96-72)/(72-68)=24/4= 
24/4 = 6
6/1   6:1NSWER:6:1
Answer: A
A certain sum of money doubles itself in 20 years in how much many years will it trible itself at the same rate?
Choose the correct answer:
A) 20 years  B) 76 years  C) 88 years  D) 40 years  E) 11 years

Solution: 100 ---- 100 --- 20   100 --- 20   --------------------   300 ---- 40 years   Answer: 40 years
Answer: D
A train is running at a speed of 40 km/hr and it crosses a post in 22.5 seconds. What is the length of the train?	Choose the correct choice from the following answers:
A) 190 metres
B) 160 metres
C) 200 metres
D) 120 metres
E) 250 metres

Solution: Speed of the train, v = 40 km/hr = 40000/3600 m/s = 400/36 m/s   Time taken to cross, t = 22.5 s   Distance Covered, d = vt = (400/36)Ã— 22.5 = 250 m   Distance covered is equal to the length of the train = 250 m   Correct answer is 250 metres   250 metres
Answer: E
Which of the following must be an integer if the integer x is divisible by both 27 and 21? Choose the correct choice from the following
A) x/252  B) x/189  C) x/126  D) x/108  E) x/89

Solution: the integer has to be multiple of LCM of 27 and 21, which is 189..   so x/126 will be an integer   ans x/89
Answer: E
In how many ways can live 2boys and 4 girls sit in a row such that all boys sit together?	Choose the correct choice from the following options:	A) 240	B) 120	C) 150	D) 720	E) 165

Solution: Treat all boys as one unit. Now there are four students and they can be arranged in 5! ways. Again five boys can be arranged among themselves in 2! ways.   Required number of arrangements   = 5! * 2! = 240   240nswer: 240
Answer: A
David decides to attend a base ball game with six friends. If the party of seven sits together in seven consecutive seats, and David must NOT sit in between two of his friends, how many ways can the seven friends be arranged? Choices:
A) 360
B) 180
C) 90
D) 720
E) 1440

Solution: David have to sit at either of the ends.   If David sits on the left most corner, then other 6 friends can be arranged in 6! = 720   David can also sit on the other end, then another 6! ways we can arrange.   So total number of ways = 720+720= 
720+720 = 1_440
1440   Answer : 1440
Answer: E
A, B and C enter into a partnership. They invest Rs. 80,000, Rs. 80,000 and Rs. 1,20,000 respectively. At the end of the first year, B withdraws Rs. 40,000, while at the end of the second year, C withdraws Rs. 80,000. In what ratio will the profit be shared at the end of 3 years ?	Pick one
A) 6 : 4 : 8	B) 6 : 4 : 7	C) 6 : 4 : 2	D) 6 : 4 : 1	E) 6 : 4 : 5

Solution: A : B : C = (80000 x 36) : (80000 x 12 + 40000 x 24) : (120000 x 24 + 40000 x 12)   = 288 : 192 : 336   = 6 : 4 : 7.   Answer: 6 : 4 : 7
Answer: B
Two trains are running at 40 km/h and 20 km/h respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 seconds. What is the length of the fast train? Choices:
A) 23 m
B) 23 2⁄9 m
C) 27 m
D) 27 7⁄9 m
E) None of these

Solution: Relative speed = (40 – 20) km/h   = (20 × 5⁄18) m/sec = (50⁄9) m/sec   Length of faster train   = (50⁄9 × 5) m = 250⁄9m = 277⁄9 m   Answer 27 7⁄9 m
Answer: D
131,95,70,54, ?  Options.
A) 42	B) 45	C) 44	D) 40	E) 39

Solution: 131 - 95= 
131 - 95 = 36
36= 6^2   95 - 70= 
95 - 70 = 25
25= 5^2   70 - 54= 
70 - 54 = 16
16= 4^2   so we can write   54 - x = 09 = 3^2 , where x is the next number   x = 54 - 9= 
54 - 9 = 45
45   so the next number will be 45   ANSWER:45
Answer: B
Ram buys a plot of 5200 sq. ft. The cost of the Plot is Rs.48 per sq. ft.He has to pay 17% of the total cost as the booking cost for the plot.How much he has to pay as booking cost?	Choose the correct choice from the following options:  A) Rs.42432  B) Rs.42436  C) Rs. 42518  D) Rs. 42560  E) Rs. 52560

Solution: 5200*48*17/100= 
5200*48*17/100 = 42_432
42432   Rs.42432NSWER:Rs.42432
Answer: A
A real estate agent received a 6% commission on the selling price of a house. If his commission was $8,880, what was the selling price of the house?	Choose the correct choice from the following answers:	A) $234,000	B) $227,000	C) $148,000	D) $479,000	E) $337,000

Solution: 6% x = 8,880 : x = selling price of house.   x = $148,000 : solve for x   correct answer $148,000.
Answer: C
If w = (x – 5)^2 + (x + 1)^2 – 6, then y is least when x = Pick one:
A) -2	B) -1	C) 0	D) 2	E) None of the above

Solution: Let us transform the formula:   w = (x – 5)² + (x +1)² – 6 =   x² – 10x + 25 + x² + 2x + 1 – 6 =   2x² – 8x + 20 = 2 × (x² – 4x + 10) =   2 × ((x² – 4x + 4) + 6) =   2 × ((x – 2)² + 6)   Any square is greater or equal 0. Therefore the formula possess the least value when (x – 2)² = 0.   x – 2 = 0   x = 2   The correct answer is choice (2).
Answer: D
What annual instalment will discharge a debt of Rs 1092 due in 3 years at 12% simple interest?  Choose the correct choice from the following choices
A) Rs.325
B) Rs.545
C) Rs.560
D) Rs.550
E) Rs.450

Solution: Let each instalment be Rs.x .   1st year = [x + (x * 12 * 2)/100]   2nd year = [ x + (x *12 * 1)/100]   3rd year = x   Then, [x + (x * 12 * 2)/100] + [ x + (x *12 * 1)/100] + x =1092   3x + ( 24x/100 ) + ( 12x/100 ) = 1092   336x =109200   x = 325   Each instalment = Rs. 325 Rs.325nswer: Rs.325
Answer: A
If a real number x is chosen at random in the interval [0,4] and a real number y is chosen at random in the interval [0,5], what is the probability that x < y?  Select the correct option:	A) 3/5	B) 2/5	C) 7/10	D) 3/4	E) 2/3

Solution: Since x is in [0,4] and y is in [0,5] we can draw a rectangle in the coordinate plane with vertices (0, 0), (4, 0), (0, 5), and (4, 5).   The points above the line y=x satisfy x < y.   The part of the rectangle below y=x has an area of 8.   The whole rectangle has an area of 20.   P(x < y) = (20-8)/20 = 12/20 = 3/5   The answer is 3/5.
Answer: A
How many Books each of Volume 250 meter cube can be packed into a crate of volume 4500 meter cube	Pick:
A) 25 B) cannot be determined C) 10 D) 15 E) 20

Solution: Gud question with a simple concept.   In geo if we want to insert one shape into another we need to know the dimensions of the two shapes.   In above with volume given , we can come up with different shapes, so we cant know the answer   For ex :4500 m3 can be 450*10 or 45*100 or just 4500*1 we don't know , so we cant calculate   Answer : cannot be determined
Answer: B
If 8^x = 2^18, what is x?  Select:
A) 2  B) 3  C) 4  D) 5  E) 6

Solution: 2^3x= 2^18   3x=18, therefore x=6   Answer 6
Answer: E
A company has 15 managers and 75 associates. The 15 managers have an average salary of $60,000. The 75 associates have an average salary of $30,000. What is the average salary for the company? Choose one:
A) $35,000	B) $45,000	C) $55,000	D) $65,000	E) $75,000

Solution: Another method is to get ratios   Say 30000=a and   We know the # of people are in 1:5 ratio   Average=(2a*1+a*5)/6= 7a/6=35000   Answer is A. $35,000
Answer: A
If p=n-8 , m=n+10; then in terms of p,m is ?
Select
A) m= p+8
B) m= p+18
C) m= p-18
D) m= p-8
E) m= p+1

Solution: p = n-8   That is,n = p+8.   Therefore,   m = n+10   m= p+8+10   m= p+18   ANSWER:m= p+18
Answer: B
When asked what the time is,a person answered that the amount of time left is 2/6 of the time already completed.what is the time.  Choices:	A) 2 PM	B) 9 PM	C) 3 PM	D) 6 PM	E) 7 PM

Solution: A day has 24 hrs. Assume x hours have passed. Remaining time is (24 - x)   24−x=2/6x⇒x=18   Time is 6 PM   Answer:6 PM
Answer: D
Linda spent 2/4 of her savings on furniture and the rest on a TV. If the TV cost her $300, what were her original savings? Choose the correct option
A) $900 B) $300 C) $600 D) $700 E) $800

Solution: If Linda spent 3/4 of her savings on furnitute, the rest   4 / 4 - 2 / 4 = 1 / 2 on a TV   But the TV cost her $300. So 1 / 2 of her savings is $300. So her original savings are 2 times $300 = $600   correct answer $600
Answer: C
All the stocks on the over-the-counter market are designated by either a 2 letter or 3 letter codes that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different stocks that can be designated with these codes?
Pick
A) 2(26^5)	B) 26(26^4)	C) 27(26^2)	D) 26(26^5)	E) 27(26^5)

Solution: with 2 letters: 26^2   with 3 letters: 26^3   26^2 + 26^3 = 27*(26^2)   27(26^2)
Answer: C
The simple interest on Rs.13000 at a certain rate of interest in five years is Rs.7200. Find the compound interest on the same amount for two years at the same rate of interest.
Choices.
A) 3052.82 B) 3039.89 C) 3052.85 D) 3039.51 E) 3039.82

Solution: R = 100 I / PT   => R = (100 * 7200)/ (13000 * 5) = 11.07%   CI = P{ [1 + R /100]n - 1}   = 13000 { [ 1 + 11.07 / 100]^2 - 1} = Rs.3039.51   Answer:3039.51
Answer: D
If x^2 + 1/x^2 = 3,what is the value of x^4 + 1/x^4 ? Choose the most appropriate option.
A) 7	B) 12	C) 14	D) 16	E) 18

Solution: IMPORT7NT: I notice that if we SQU7RE x², we get x⁴, and if we SQU7RE 1/x², we get 1/x⁴, so let's see what happens if we take the equation x² + 1/x² = 3 andSQU7REboth sides:   (x² + 1/x²)²= 9   So, (x² + 1/x²)(x² + 1/x²) = 9   Expand to get: x⁴ + 1 + 1 + 1/x⁴ = 9   Simplify: x⁴ + 1/x⁴ = 7   7nswer: 7
Answer: A
The value of x + x(xx) when x = 2 Pick.
A) 10
B) 16
C) 18
D) 36
E) 64

Solution: x + x(xx)   Put the value of x = 2 in the above expression we get,   2 + 2(22)   = 2 + 2(2 × 2)   = 2 + 2(4)   = 2 + 8= 
2 + 8 = 10
10 The answer is (10)
Answer: A
A software programmer does 20% of the work in 60% of the time, and 80% of the work in the remaining 20% of the time. If the code he writes is X lines long and he was given one month (30 days) to accomplish the task, then, assuming that the programmer works at a constant rate in each of the two stages, How many lines of code were written in the last two weeks, in terms of X? Choose the correct choice from the following choices: A) 13x /15 B) 15x/15 C) 7x/15 D) 2x/30 E) 13x/30

Solution: Take X=30 lines   80% of 30 = 24 lines   20% of 30 = 6 lines   W - R - T   6 lines - r1 - 24 (first 80% of the 30 days)   24 lines - r2 - 6 ( last 20% of the 20 days)   r1 = 1/4r2 = 4   Now Work in last 14 days = 6 days programmer worked at r2 + 8days programmer worked at r1   => 6 * 4 + 8 * 1/4 = 24 + 2= 
24 + 2 = 26
26   Insert, X=30 in all options => 2x/30 is the answer.
Answer: D
Find the area of a rhombus one side of which measures 20 cm and one diagonal is 24 cm. Choose the correct choice from the following: A) 370 cm2 B) 365 cm2 C) 380 cm2 D) 384 cm2 E) 394 cm2

Solution: Explanation: Let other diagonal = 2x cm.   Since diagonals of a rhombus bisect each other at right angles, we have:   (20)2 = (12)2 + (x)2 =>x =√(20)2 – (12)2= √256= 16 cm. _I   So, other diagonal = 32 cm.   Area of rhombus = (1/2) x (Product of diagonals) =(1/2× 24 x 32) cm2 = 384 cm2   Answer: Option 384 cm2
Answer: D
A person can swim in still water at 4 km/h. If the speed of water 2 km/h, how many hours will the man take to swim back against the current for 6km?  Answers:
A) 3 B) 7 C) 4 D) 9 E) 2

Solution: M = 4   S = 2   US = 4 - 2= 
4 - 2 = 2
2   D= 6   T = 6/2= 
6/2 = 3
3   3nswer: 3
Answer: A
The value of x + x(xx) when x = 7 is:	Choose the most appropriate option
A) 8	B) 10	C) 350	D) 14	E) 16

Solution: x + x(xx)   Put the value of x = 7 in the above expression we get,   7 + 7(7*7)   = 350   ANSWER : (350
Answer: C
A 4-letter code word consists of letters A, B. If the code includes all the three letters, how many such codes are possible?
Choose the correct answer:
A) 72 B) 12 C) 36 D) 24 E) 18

Solution: Note that the correct answer to this question is 36, not 72.   AB-AB can be arranged in 4!/2!=12 ways;;   Total: 12.   Answer: 12.
Answer: B
A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?	Answers:
A) 25 days
B) 14 days
C) 24 days
D) 145 days
E) 78 days

Solution: 2c =1/4 + 1/6 – 1/3 = 1/12   c = 1/24 => 24 days   Answer: 24 days
Answer: C
If a 2 cm cube is cut into 1 cm cubes, then what is the percentage increase in the surface area of the resulting cubes?  Pick one:	A) 50%	B) 100%	C) 150%	D) 200%	E) 250%

Solution: The area A of the large cube is 2*2*6= 
2*2*6 = 24
24 square cm.   The area of the 8 small cubes is  8*6= 
 8*6 = 48
48= 2A, an increase of 100%.   The answer is 100%.
Answer: B
A dishonest dealer professes to sell goods at the cost price but uses a false weight and gains 25%. Find his false weight age?  Choose the correct choice from the following
A) 700  B) 726  C) 800  D) 278  E) 298

Solution: n:   25 = E/(1000 - E) * 100   1000 - E = 4E   1000 = 5E => E = 200   1000 - 200= 
1000 - 200 = 800
800   Answer:800
Answer: C
The ratio of pens to pencils is 5 to 6. There are 7 more pencils than pens. How many pencils are there?  Choices.
A) 36
B) 42
C) 48
D) 55
E) 64

Solution: Let the number of pens be 5x and the number of pencils be 6x.   6x - 5x = 7   x = 7   The number of pencils is 42.   The answer is 42.
Answer: B
In a sports club with 30 members, 17 play badminton and 17 play tennis and 2 do not play either. How many members play both badminton and tennis? Answers:	A) 7	B) 6	C) 9	D) 10	E) 11

Solution: Let x play both badminton and tennis so 17-x play only badminton and 17-x play only tennis. 2 play none and there are total 30 students. hence,   (17-x)+(17-x)+x+2=30   36-2x+x=30   36-x=30   x=6   So 6 members play both badminton and tennis.   6
Answer: B
Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of that work in	Choose the correct choice from the following answers
A) 9 B) 8 C) 4 D) 3 E) 1

Solution: Explanation:   Let x men can do the in 12 days and the required number of days be z   More men, Less days [Indirect Proportion]   Less work, Less days [3irect Proportion ]   Answer: 3) 3 days
Answer: D
What is the units digit of (147^21)^48 ?	Answers:  A) 1  B) 3  C) 5  D) 7  E) 9

Solution: The units digit of the exponents of 7 repeat in a cycle of four, which is {7,9,3,1}. The number 21 has the form 4n+1 so the units digit is 7 inside the bracket. The number 48 has the form 4n, so the units digit is 1. The answer is 1.
Answer: A
There are 10 person among whom two are brother. The total number of ways in which these persons can be seated around a round table so that exactly one person sit between the brothers , is equal to:
Choose the correct answer:
A) 2!*7! B) 2!*8! C) 3!*7! D) 3!*8! E) None of these

Solution: Solution: Total number of ways = 7!*2!.   2!*7!nswer: Option 2!*7!
Answer: A
Express a speed of 414 kmph in meters per second?
Choose the correct choice from the following.
A) 201 mps B) 114 mps C) 118 mps D) 115mps E) 111 mps

Solution: 414* 5/18= 
414* 5/18 = 115
115 mps   Answer: 115mps
Answer: D
Ramesh purchased a refrigerator for Rs. 13500 after getting a discount of 20% on the labelled price. He spent Rs. 125 on transport and Rs. 250 on installation. At what price should it be sold so that the profit earned would be 10% if no discount was offered?  Choose the correct choice from the following options:
A) 34778  B) 26888  C) 2899  D) 18975  E) 12778

Solution: Price at which the TV set is bought = Rs. 13,500   Discount offered = 20%   Marked Price = 13500 * 100/80 = Rs. 16875   The total amount spent on transport and installation = 125 + 250 = Rs. 375\Total price of TV set = 15625 + 375 = Rs. 16000   The price at which the TV should be sold to get a profit of 10% if no discount was offered = 17250 * 110/100   = Rs. 18975   Answer: 18975
Answer: D
By investing Rs. 1620 in 8% stock, Michael earns Rs. 135. The stock is then quoted at: Choose the correct option:
A) Rs. 80
B) Rs. 96
C) Rs. 106
D) Rs. 108
E) Rs. 118

Solution: Michel earns Rs 135 by investing Rs1620   To earn Rs 8 how much he have to invest?   =(8*1620)/135= 
(8*1620)/135 = 96
Rs 96   ANSWER:Rs. 96
Answer: B
Of the four-digit positive integers that have no digits equal to zero, how many have two digits that are equal to each other and the remaining digit different from the other two?
Pick.
A) 6048  B) 3648  C) 7248  D) 1448  E) 2168

Solution: Of the four-digit positive integers that have no digits equal to zero, how many have two digits that are equal to each other and the remaining digit different from the other two?   A. 24   B. 36   C. 72   D. 144   E. 216   Choosing the digit for p - 9 ways;   Choosing the digit for q - 8 ways;   Choosing the digit for r - 7ways;   # of permutations of 3 digits in ppqr - 4!/2!   Total: 9*8*7*4!/2!=6048.   6048nswer: 6048.
Answer: A
The average weight of 8 persons increases by 5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?
Choose the correct choice
A) 75 kg	B) 65 kg	C) 55 kg	D) 85 kg	E) 105 kg

Solution: Total weight increased = (8 x 5) kg = 40 kg.   Weight of new person = (65 + 40)= 
(65 + 40) = 105
105 kg.   Answer: 105 kg
Answer: E
Yali builds a tower using only red, green, and blue toy bricks in a ratio of 4:3:1. She then removes 1/2 of the green bricks and adds 1/3 more blue bricks, reducing the size of the tower by 14 bricks. How many red bricks will she need to add in order to double the total number of bricks used to build the original tower?  Pick:
A) 82
B) 96
C) 110
D) 120
E) 192

Solution: Yali want to double the original amount of blocks, not just the red blocks   the original tower had 96 bricks, the new tower has 82 bricks and the question is asking how many extra red blocks are needed to build a tower of 192 bricks (double the original: 96*2).   192-82= 
192-82 = 110
110   so 110 bricks need to be added to the new 82 brick tower to double the original.   They worded the question ashow many red bricks need to be addedbut really it could be any colour just that 110 more bricks need to be there to equal 192=192
Answer: E
The ratio of the length and the breadth of a rectangle is 4 : 3 and the area of the rectangle is 6912 sq cm. Find the ratio of the breadth and the area of the rectangle?  Answers.
A) 1 : 96	B) 1 : 97	C) 1 : 98	D) 1 : 99	E) 1 : 93

Solution: Let the length and the breadth of the rectangle be 4x cm and 3x respectively.   (4x)(3x) = 6912   12x2 = 6912   x2 = 576 = 4 * 144 = 22 * 122 (x > 0)   => x = 2 * 12= 
2 * 12 = 24
24   Ratio of the breadth and the areas= 3x : 12x2 = 1 : 4x = 1: 96.   1 : 96nswer: Option 1 : 96
Answer: A
Gao earns $25.00 for each house she cleans. She refuses to work weekends. Monday she cleaned 2 houses 1 on Tuesday and only 3 more for the rest of the week. How much money did Gao earn this week?  Choose one
A) $160
B) $140
C) $170
D) $165
E) $135

Solution: Adding all the houses together is 2+1+3= 
2+1+3 = 6
6. If she gets $25 for each house then you must multiply 25 and 6. 25 x 6=160. She got $160 this week.
Answer: A
A train 400 m long can cross an electric pole in 20 sec and then find the speed of the train?	Choose the correct choice from the following answers:  A) 65 Kmph  B) 70 Kmph  C) 72 Kmph  D) 75 Kmph  E) 73 Kmph

Solution: Explanation:   Length = Speed * time   Speed = L/T   S = 400/20= 
400/20 = 20
20 M/Sec   Speed= 20*18/5 (To convert M/Sec in to Kmph multiply by 18/5)   Speed = 72 Kmph   ANSWER IS 72 Kmph
Answer: C
Three boys, two girls, and two women are to be seated on a bench. If one specific boy must be seated on one of the end seats, and one specific girl must me seated exactly in the middle, find the number of possible arrangements Q. Select the correct option:  A) a) Q=48  B) b) Q=144  C) c) Q=240  D) d) 288  E) e) 120

Solution: One specificboy is seated to either of end seat, lets call him b1   One specificgirl is seated in the middle, lets call her g1   Note the question says *specific girl* and *specific boy*, so we do not consider for example the other girl , g2, being seated on seat #4. Same goes with the specific boy, b1.   b1 can be seated 2 different seats : 2!   g1 is seated on the seat #4, fixed (no other alternative) : 1   the remaining 5 seats can be filled with the remaining people b2,b3,g2,w1,w2: 5!   2! x 1 x 5! = 240   Answer c) Q=240
Answer: C
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ? Choose the correct choice from the following options:
A) 4 B) 8 C) 16 D) 12 E) 14

Solution: Since the number is greater than the number obtained on reversing the digits, so the ten's digit is greater than the unit's digit.   Let ten's and unit's digits be 2x and x respectively.   Then, (10 x 2x + x) - (10x + 2x) = 36   9x = 36   x = 4.   Required difference = (2x + x) - (2x - x) = 2x = 8.   answer :8
Answer: B
An empty wooden vessel weighs 8% of its total weight when filled with paint. If the weight of a partially filled vessel is one half that of a completely filled vessel, what fraction of the vessel is filled.
Choose the correct choice from the following choices
A) 3/5
B) 5/9
C) 1/24
D) 4/9
E) 3/7

Solution: An empty wooden vessel weighs 8% of its total weight when filled with paint:   Vessel = 0.08(Vessel + Paint);   8V = V + P (so the weight of completely filled vessel is 8V)   P = 7V (so the weight of the paint when the vessels is completely filled is 7V).   The weight of a partially filled vessel is one half that of a completely filled vessel:   V + P' = 1/2*8V;   P' = 3V (so the weight of the paint when the vessels is partially filled is 3V).   What fraction of the vessel is filled?   So, we need to find the ratio of the weight of the paint when the vessel iscompletely filledto the weight of the paint when the vessel ispartially filled:   P'/P = 3V/7V = 3/7.   Answer: 3/7
Answer: E
If the sum of two numbers is 55 and the H.C.F and L.C.M of these numbers are 5 and 120 respectively, then the sum of the reciprocal of the numbers is equal to:
Choose the correct choice from the following options:
A) 55/601	B) 601/55	C) 11/120	D) 120/11	E) 120/13

Solution: Let the numbers be a and b.   Then, a + b = 55 and ab = 5 * 120= 
5 * 120 = 600
600.   Required sum= 1/a + 1/b = (a + b)/ab = 55/600 = 11/120.   ANSWER:11/120
Answer: C
In what time will a railway train 90 m long moving at the rate of 36 kmph pass a telegraph post on its way?	Choose the correct choice from the following choices
A) 8 sec  B) 1 sec  C) 9 sec  D) 6 sec  E) 2 sec

Solution: T = 90/36 * 18/5= 
90/36 * 18/5 = 9
9 sec   Answer:9 sec
Answer: C
Dawson professes to sell his goods at the cost price but he made use of 600 grams instead of a kg, what is the gain percent? Choose the correct choice from the following answers:	A) 13 2/3%	B) 14 2/3%	C) 15 2/3%	D) 16 2/3%	E) 17 2/3%

Solution: Answer:	600 --- 100   100 --- ? => 16 2/3%   Answer:16 2/3%
Answer: D
Three friends (Fred, James and Kelly) are employees of a company. Their respective salaries are in the ratio of 4 : 6 : 7. James and Kelly's salaries together is Rs. 8840. By what percent is Kelly's salary than that of Sarah?  Answers:	A) 40%	B) 60%	C) 90%	D) 70%	E) 80%

Solution: Explanation:   Let the salaries be 4x, 6x and 7x respectively.   Then,6x + 7x = 8840 => x = 680.   Fred's salary = Rs. 2800, James's salary = Rs. 4080, and Kelly's salary Rs. 4760.   Excess of Kelly's salary over Fred's=[ (1960 /2800) x 100] = 70%.   Answer: 70%
Answer: D
In order to complete a reading assignment on time, Terry planned to read 100 pages per day. However, she read only 50 pages per day at first, leaving 800 pages to be read during the last 6 days before the assignment was to be completed. How many days in all did Terry have to complete the assignment on time?  Options.
A) 12 B) 14 C) 16 D) 10 E) 18

Solution: D=100*X - according to the plan, assignment to be completed on time reading 100 pages per day for next X days. But, Terry's plans changed so she read as follow:   50 pages for first Y days and 800 pages for last 6 days, we get these equations:   50*Y+800=100*X   X-Y=6 --------->>X planned number of days, Y - actually used reading 60 pages per day and 6 leftover days used to complete a lump 780 pages   From above we find that X=Y+6 and 50Y+800=100Y+600 or 50Y=200 --->>>>> Y=4, hence X=10   Answer : 10
Answer: D