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Data Sufficiency Question:a and b are two positive numbers. How many of them are odd?

I. Multiplication of b with an odd number gives an even number.

II.a2a2 - b is even.

b is odd
a is odd
both of a and b are odd.
none of a and b are odd.
Explanation:

From the 1st statement b is even, as when multiplied by odd it gives even

a2a2 - b = even

=> a is even

Here none of a and b are odd.

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