GMAT Math Practice Test #1

Answer - A- Tackle the problem in two stages. First find the value of exponent ignoring the decimal. Second, find the position of the decimal.

2⁵ = 2 x2 x 2 x2 x 2 x 2 = 32
(0.2)⁵ = 0.2 x 0.2 x 0.2 x 0.2 x 0.2 x 0.2 = 0.00032

Key takeaway: In decimal based exponents’ problems, be careful in placing decimal at correct position.