Bunuel wrote:
Tough and Tricky questions: Number Properties.
Is the product of a and b odd?
(1) a has only 2 factors
(2) b = 2x + 1, where x is an integer
Kudos for a correct solution.The product will be odd if both a and b are odd
1. a has two factors so a is prime...now if a=2,b=odd number then product is not even but if a=any other prime and b=odd number than product is odd...clearly we dont have enough information.. Option A and D ruled out
b=2x+1 so possible values for b=1,3,5,7...b= odd number...B ruled out
Combining both statements we can still have product even or odd..
ans E
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