Hi @mathematrix my answer is 90.
4^2 + 4 = 20
5^2 + 5 = 30
6^2 + 6 = 42
7^2 + 7 = 56
9^2 + 9 = 81
You are viewing a single comment's thread from:
Sort: Trending
Hi @mathematrix my answer is 90.
4^2 + 4 = 20
5^2 + 5 = 30
6^2 + 6 = 42
7^2 + 7 = 56
9^2 + 9 = 81