Question

Which number is the same as (4-1)20-4-2), A - 2 B. 1/8C 2 D. 32 E. 512

Answer 1

$(4^{-1})(\frac{2^3}{4^{-2}})=4^{-1}\cdot4^2\cdot2^3=4\cdot2^3=4\cdot8=32$