Question

9 11 7 24
17 6 4 24
12 12 9 ?
ans is 31
explain please ​

Answer 1

answer should be 18..

as sum of no. in 1st and 2nd row is 51..

so in 3rd for sum to be 51 last no. should be 18..

by the way it's reasoning...and it can have multiple answers....

hope it helps you...

Answer 2

Answer:

9+24=33. 11+7=18

3+3=6.(sum of digit) 6×3=18(sum of mid term)

17+24=41. 6+4=10

4+1=5. 5×2=10

12+*31* =43. 12+9=21

4+3=7. 7×3=21.