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if y is the smallest positive interger such that 3150 multip
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A car starts from X and moves towards Y. At the same time
A car starts from X and moves towards Y. At the same time another car starts from Y and moves towards X. Both travel at a constant speed and meet after 4 hours. During that time, the faster car...
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If a is a positive integer and 20 < a < 100, is a^3 − a
If a is a positive integer and 20 < a < 100, is a^3 a divisible by 15?(1) The units digit of a is 9.(2) The tens digit of a is 3.
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At the Marseille port, a small cargo ship is loaded in 2.5
At the Marseille port, a small cargo ship is loaded in 2.5 hours and a large cargo ship is loaded at double the rate in X hours. In terms of X, how many times does the load of a small cargo ship fit...
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Mary and Ket are cousins.Mary's present age is 9 times what
Mary and Ket are cousins. Mary's present age is 9 times what Ket's age 12 years ago was. When Ket will be 17 years older than Marry's present age, the sum of their ages will be 100. The present ages of...
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If a certain culture of bacteria increases by a constant
If a certain culture of bacteria increases by a constant factor of x every y minutes, how long will it take for the culture to increase to ten-thousand times its original size?1. x=10^y2.In two...
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Each of a, b, and c is positive. Does b = root(ac)
Each of a, b, and c is positive. Does b = \sqrt{ac}?(1) \frac{a}{b} = \frac{b}{c}(2) \frac{1}{b^3} = \frac{1}{abc}
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There is a set of beads, each of which is painted either red
There is a set of beads, each of which is painted either red or blue. The beads are split, with each bead being cut in half. Then they are merged, where all the halves are randomly reassembled back...
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A jar contains 4 black and 3 white balls. If you pick two ba
A jar contains 4 black and 3 white balls. If you pick two balls at the same time, what's the probability that one ball is black and one is white?A. 2/7B. 5/7C. 4/7D. 3/7E. 1/2
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Problem factoring difficult quadratic equation
I had problem factoring x^2 + 12x - 540 when I first saw this problem. I now know what factors will work after 5 minutes. I broke 540 into primes: 2^2, 3^4, and 5, but it was still not obivous what...
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How many ways can you distribute 5 marbles in 3 identical ba
How many ways can you distribute 5 marbles in 3 identical baskets such that each basket gets at least 1 marble.I am trying to solve this problems using as many approaches:The correct answer is: we can...
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Two teams A and B comprising of 3 members each take part
Two teams A and B comprising of 3 members each take part in a Math competition. The test consists of 6 problems and if any member of a team solves 3 problems correctly, then the member wins a gold...
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If set S consists of the numbers w, x, y, z is the range of
If set S consists of the numbers w, x, y, z is the range of numbers in the S greater than 5?(1) The range of any three numbers in the set S is greater than 5.(2) The positive difference between any two...
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Is the range of the integers 4, 7, x, 6, 5, y greater than 9
Is the range of the integers 4, 7, x, 6, 5, y greater than 9 ?(1)y > x^2(2) 3 < x < yCan someone explain, not satisfied with the explanation provided by TOTAL GMAT MATH, jeff sackmann!Thanks
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A company assigns product codes consisting of all the letter
A company assigns product codes consisting of all the letters in the alphabet.How many product codes are possible if the company uses at most 3 letters in its codes, and all letters can be repeated in...
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Do you ignore complex roots of a cube in DS problems
I was doing the manhattan CAT and I got a problem wrong because I considered the complex roots of a cube. Do we ignore them for GMAT.
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If f(x)=x^2/b^2 + 2x + 4, then for each non-zero value of b
If f(x)=x^2/b^2 + 2x + 4, then for each non-zero value of b the function of f(x) is the least when x equalsA. -1 -\sqrt{(1-4b)}B. -2C. 0D. -b^2E. b-4
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If A(n)=1/(n(n+1)) for all positive integers n, what is the
So I'm working throu Manhattan GMAT advanced quant book and got stuck on this problem:If A(n)=1/(n(n+1)) for all positive integers n, what is the sum of the first 100 elements of An?The book calculates...
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How to get a linear combination of sinusoidal function from
I know the question is not related but still I think gmatclub is the best place to get a solution.How to get a linear combination of sinusoidal function from this (1 + 0.1 cos5t) cos 100t. if anyone...
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