Forum: GMAT Problem Solving

If x and y are positive integers and 1 + x + y + xy = 15, what is the value of x + y? A. 3 B. 5 C. 6 D. 8 E. 9

A total of 11 teams participated in a hockey tournament in which every team played exactly one match with every other team. In any match a team gets four points for a win, three points for a draw and two points for a loss. The total score of no two teams was the same at the end of the tournament....

There are n terms in an arithmetic progression. The n terms of the arithmetic progression are now distributed into eight sub series – S1, S2 ……and S8 – as follows. The 1st, 9th, 17th terms and so on go into S1; the 2nd, 10th, 18th terms and so on go into S2; the 3rd, 11th, 19th terms and so on go...

7829 An air-powered rifle was shot at 2 different targets. What was the average speed of the bullet? (1) One target was 900 feet further away than the other target. (2) The bullet passed the first target and reached the second target in seconds. (A) Statement (1) ALONE is sufficient,...

If the sum of the cubes of a and b is 8 and a'6 – b'6 = 14, what is the value of a'3 – b'3? 1/4 1/2 5/4 7/4 2 ' - degree

A certain club has 15 members. What is the ratio of the member of 4-member committees that can be formed from the members of the club to the number of 3-member committees that can be formed from the members of the club? A. 6 to 1 B. 4 to 3 C. 3 to 1 D. 4 to 1 E. 12 to 5

If |b|>=2 and x=|a|b then which of the following is always true? a) a-xb>=0 b) a+xb>=0 c) a+xb<=0 d) a-xb<=0 e) both b and d

7359 If m and n are integers greater than zero, is the ratio of m to n 2 : 1? (1) m – n > 0 (2) mn = 14 (A) Statement (1) ALONE is sufficient, but statement (2) is not sufficient. (B) Statement (2) ALONE is sufficient, but statement (1) is not sufficient. (C) BOTH statements...

Q) For which of the following functions is f(a+b) = f(a) + f(b) for all positive numbers a and b. f(x) = x^2 f(x) = x +1 f(x) = x^(1/2) f(x) = 2/x f(x) = -3xCan you explain the concept along with the solution. The correct option is the last one.

A large cube consists of 125 identical small cubes. How many of the small cubes are exposed in air? A. 64 B. 72 C. 98 D. 100 E. 116 Please explain:hmm:

A tap takes 8 seconds to fill a jar and 6 minutes to fill a drum. Sara has to fill the drum with the jar. First he fills the jar and then brings it to the drum and pours the water into the drum. The time taken to bring the jar from the tap to the drum is 10 seconds. Unfortunately, the jar develops...

The first 20 positive integral powers (the index being a positive integer) of the first 100 natural numbers are stored in the memory of a computer. The computer then randomly selects one of these numbers and finds the units digit of that number. If Pk is the probability of the digit k (0 <= k <=...

Q1. If n and y are positive integersand 450=n^3, which of the following must be an integer ? i) y/(3*2^2*5) ii) y/(2*3^2*5) iii) y/(3*2*5^2) A) None B) i only C) ii only D) iii only E) All(i,ii and iii)

On Saturday morning, Malachi will begin a camping vacation and he will return home at the end of the first day on which it rains. If on the first three days of the vacation the probability of rain on each day is 0.2, what is the probability that Malachi will return home at the end of the day on the...

In a box of 10 electrical parts, 2 are defective. If 2 parts are randomly chosen, without replacement, what is probability that both are defective?

Suppose you make a saving of Rs. 50,000 at the end of each month, assume an interest of 7% compounded monthly, how much will you have accumulated at the end of 4 years? a) 50000/ (0.07) b) 50000/ 0.07 c) 50000/ (0.07/12) d) 50000(1+0.07)4