Question

if 1=5,2=25,3=45,4=65,5=?

Answer 1

1=5 so 5=1

simple
hope that it was helpful
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Answer 2

1=5
2=20+5=25
3=25+20=45
4=45+20=65
5=65+20=85

and also 5=1 its correct .

I hope its help you.