16.
what number comes next 1 -8 -16 -24 -33
the next answer would be 1,024
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
32
32
The series 1 6 10 13 15 (1+5=6; 6+4=10, 10+3=13; 13+2=15) is completed by 15+1=16. The answer is 16.
81
16384
24
7
13