Question

What is the value of x? Statement 1: x + y = 12. Statement 2: y = 5.

Solution

1. Statement 1 alone has many possible values for x and y, so it is insufficient.
2. Statement 2 alone gives y but not x, so it is insufficient.
3. Together, x + 5 = 12, so x = 7.
4. Therefore, both statements together are sufficient.