Hi there,
these should be the codes hope they help
Sequence 1, addition progression: 1, 2, 4, 7, 11, 16... ?
The answer is 22.
Sequence 2, subtractive progression: 21, 18, 16, 15, 15, 16... ?
The answer is 18.
Sequence 3, multiplication progression: 1, 2, 4, 8, 16, 32... ?
The answer is 64. Each number multiplies by 2.
Sequence 4, division progression: 128, 64, 32, 16, 8, 4... ?
The answer is 2. Each number divides by 2.
Sequence 5, exponential progression: 32, 81, 64, 25... ?
The answer is 6. 2 to the 5th, 3 to the 4th, 4 to the 3rd, 5 to the 2nd, and 6 to the 1st power.
Sequence 6, logarithmic progression: 1 0 - 8 3 - 32 5 - 128 ... ?
The answer is 7. 2 to the 0 power is 1, 2 to the 3rd is 8, 2 to the 5th is 32, and 2 to the 7th is 128.