# Calculation puzzle 004

20 ~ 32 = 100

22 ~ 19 = 25

81 ~ 50 = 81

24 ~ 22 = ?

Possible answers: 225, 196, 121, 625 or 400.

I saw this question on the internet, these question types are YÖS exam questions and as seen from the picture I think it belongs to YÖS questions book by Kuark publications. I tried to solve it myself but couldn't. Obviously, the resulting numbers are related to the squares, but squares of what; difference between each number, or digits, or summation of them, etc.

$$2^0+3^2=10^2=100$$ $$2^2+1^9=5^2=25$$ $$8^1+5^0=9^2=81$$ $$2^4+2^2=20^2=400$$