7 + 21 + 2 + 86 + 4 = 120
4 + 17 = 21
sqrt(4) + 21 = 2 + 21 = 23
3.5 + 5 + 4 + 8.5 = 21
21
It's 21.
26 - 21 = 5 or 24 - 23 = 1
1 + 2 + 3 + 4 + 6 + 7 + 12 + 14 + 21 + 28 + 42 = 140
The answer is 21 because if 21 is divided by 3 it equals 7 plus 4 equals 11.
Zero.
p = 4
x = 4