Question

Is k an even number?

Statements

1. k is divisible by 4.
2. k is greater than 20.

Answer

Statement 1 alone is sufficient.

Solution

1. Every multiple of 4 is even, so statement 1 guarantees yes.
2. Numbers greater than 20 can be even or odd, so statement 2 is insufficient.
3. Therefore statement 1 alone is sufficient.