SAT Math Question of the Day

Math Category: Exponents Level 1:

Q: What is 4-2?

  1. -16
  2. -1/8
  3. 1/16
  4. 1/8
  5. 16

UNANSWERED.

The correct answer is C.

A: The answer is 1/16. When you see a negative exponent like x-a, this is the same as 1/xa.
So 4-2 = 1/42 = 1/16.