SAT Math Question of the Day

Math Category: Roots Level 2:

Q: 1 / √ 6

  1. 1/6
  2. √ 6  / 6
  3. √ 6
  4. 6 / √ 6
  5. 6

UNANSWERED.

The correct answer is B.

A: The answer is √ 6  / 6.

If you have a root in the bottom half of the fraction (the denominator) you have to multiply the top and bottom parts of the fraction by the root.

1   =   1 × √ 6   =   √ 6
√ 6 √ 6 × √ 6 6

The math term for this is to "rationalize the denominator".