Question

If
7=70
6=54
5=40
4=28
Then
2=?

Answer 1

Do you seem from 7 to 6, it's subtracting 16, from 6 to 5, it's subtracting 14, from 5 to 4, subtracting 12?
This means that for 3, it's 28-10, and for 2, it's 28-10-8

Answer 2

So, what is 28-10-8

Answer 3

7 = 70
6 =54
5=40
4=28

SO ,

2=10

THE rule applied is that
7×10=70
6×9=54
5×8=40
4×7=28
2×5=10

Answer 4

i believe its 10...?