1, 2, 4, 8, ..., 128
In that sequence, each term is getting multiplied by 2.
1
1x 2 = 2
2 x 2 = 4
4 x 2 = 8
So, if we keep multiplying until we reach 128, the sequence 1, 2, 4, 8 would continued with:
8 x 2 = 16
16 x 2 = 32
32 x 2 = 64
64 x 2 = 128
So this means that the missing terms are:
16, 32, 64
This makes the whole sequence:
1, 2, 4, 8, 16, 32, 64, 132
