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September 14th, 2012, 09:12 PM   #1
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numeric entry problem with answer..but I think the answer is

wrong.

Here is the question:

Assume that 2x is a positive multiple of 5 and is greater than 5. If 2x + 1 < 100, how many values for x are possible?

I said the answer would be 18, but the website I found the question and answer on says the answer is 17
http://www.west.net/~stewart/gre/practi ... ntry-4.htm

The reasoning is that x must be greater than 5, but the problem says that 2x is greater than 5 NOT x.

Can someone shed some light?

Thanks!
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September 14th, 2012, 09:44 PM   #2
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Re: numeric entry problem with answer..but I think the answe

I agree with you, you would not eliminate 5, since 5<25.
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September 14th, 2012, 10:27 PM   #3
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As 5 < 2x < 99, 2x ? {10, 15, 20, 25, 30, 25, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95}. Hence 18 is correct.
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