SAT Math Question of the Day

Math Category: Roots Level 2:

Q: √ 50

  1. 2 √ 5
  2. 2 √ 10
  3. 5 √ 10
  4. 10 √ 5
  5. 5 √ 2

UNANSWERED.

The correct answer is E.

A: The answer is 5 √ 2 .
√ 50 =  √ (2)(5)(5)
There are two 5's under the root sign, so the 5 can be moved to outside the root.