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Easy Number Sequence

Easy Number Sequence Solution - 10 October

Given that
(78)^9 = 6
And (69)^4 = 11

Can you find out (89)^2 = ?

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Solution
7 + 8 = 15 and 15 - 9 = 6
6 + 9 = 15 and 15 - 4 = 11

Thus, (89)^2:
8 + 9 = 17 and 17 - 2 = 15