Question

look at the series 2, 1, (1/2), (1/4), .... what number come after next

Answer 1

the next no. will be 1/4-1/8=1/8

Answer 2

This is a simple division series, each number is one-half of the previous number. In other terms to say, the number is divided by 2 successively to get the next result:

1/4 ÷ 2 = 1/8