Question

if
1=5
2=10
3=30
then what is the value of 4(4=?)

Answer 1

Thank you for asking the question!
these are sequential questions. Proper lineage should be followed in such kinds of mathematical problem.
Like in above example five when multiplied with two we get ten. similarly, when ten is multiplied by three the answer is thirty and in a similar fashion when thirty is multiplied by four then final answer will be 120.

I hope it helps.