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What is the correct answer ?

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What is the correct answer ?

by airan » Sat Jun 14, 2008 6:28 am
If x and y are different prime numbers, each greater than 2, which of the following must be true ?
I. x+y != 91
II. x-y is an even integer.
III. x/y is not an integer.
A) II only
B) I and II only
C) I and III only
D) II and III only
E) I, II, and III
Last edited by airan on Sun Jun 15, 2008 3:21 am, edited 1 time in total.
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Re: What is the correct answer ?

by anshul265 » Sat Jun 14, 2008 8:20 am
The question is not very clear.
I. What does "?" signify?? Is it "<" or ">"?

II. Is there a multiply sign between x and y?
If yes then it is FALSE. Any prime number greater than 2 is odd. So odd*odd=odd.

III. TRUE. x is a prime number, so it can't be divisible by another prime number.
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