The sequence repeats these actions - multiply by 2, add 2, then subtract 1.
So the answer is 15.
9
32
What number best completes the sequence 1 1/2 5 10 1/2 18
70. You just add 14 each time.
18
13 20 12
15.
15
Type your answer here... 15
17 19 20
15,30,32,31,62,64,63..... (*2,+2,-1)
15 (times 2, plus 2, minus 1)
15 The sequence seems to be x2, +2, -1.
The number which best completes the sequence below is: 1 2 4 3 6 8 7 14 16 ?