Question

1,2,4,8....
A. start with 1 and then add 1 repeatedly
B. start with 1 and then add multiples of 2 repeatedly .
C. Start with 1 and then multiply by 2 repeatedly .
D. start with 1 and then divide by 2 repeatedly

Answer 1

Have you tried each choice to see which one works?

Answer 2

A. start with 1 and then add 1 repeatedly
1, 2, 3, 4, 5, ...
That is what you'd get from choice A., but it's not what you have, so choice A is not the answer.

Answer 3

Now try to do what choice B tells you, and see if it works.