Question

20,24,15,31,6,..ke aage ki sankhya

Answer 1

20
20+2×2=24
24-3×3=15
15+4×4=31
31-5×5=6
6+6×6=42
so, ur answer is 42

Answer 2

Hey,
Thanks for asking this question.

Correct answer is 42.

Logic-

20 + (2×2) = 24

24 - (3×3) = 15

15 + (4×4) = 31

31 - (5×5) = 6

6 + (6×6) = 42

So the next number in this series
20,24,15,32,6, is 42


Hope this answer helps.