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mgmat 3

by resilient » Wed May 21, 2008 4:10 pm
If x is a positive integer, is x! + (x + 1) a prime number?

(1) x < 10

(2) x is even

qa is e
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Source: — Data Sufficiency |
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by amitansu » Wed May 21, 2008 10:42 pm
By plugin the values we can confirm.But it might take more time if it had been an real test q. Any quicker solution !!
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i understand now

by resilient » Sat May 24, 2008 10:03 pm
I didnt test out to even number 8 on statement 2.. How foolish! I cant figure out a way just yet to make this easier. its ok though can be done in two mintues
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