SAT Math Question of the Day

Math Category: Roots Level 2:

Q: √ 18

  1. √ 2
  2. √ 3
  3. 2 √ 3
  4. √ 4
  5. 3 √ 2

UNANSWERED.

The correct answer is E.

A: The answer is 3 √ 2 .
√ 18 =  √ (2)(3)(3) .
There are two 3's under the root sign, so the 3 can be moved to outside the root.