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RE: Daily quiz #001 - Time to crack our brain #steembounty

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anderson09 (41)in #mathematics • 7 years ago

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

7 years ago in #mathematics by anderson09 (41)
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