I pity the fool who don’t study Data Sufficiency — GMAT Question of the Day

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I pity the fool who don’t study Data Sufficiency — GMAT Question of the Day

QOD2014_0819FF
Explanation
Statement (1)

t! would be odd for only two values of t, 0 and 1 as 0! = 1! = 1. So, we get t = 0 or 1. These are not unique values. This statement alone is NOT sufficient.

The correct answer is among B/C/E.

Statement (2)

t = even means that it can be any even number, 0,2,4,6 ... Hence, statement (2) by itself is NOT sufficient.

The correct answer is between C/E.

Statement (1 & 2)

From statement (1), x can be either 0 or 1 and from statement (2), x can be even, which implies x = 0, an even number. Both the statements together are SUFFICIENT.

Correct choice is C; both statements together are sufficient.