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I'm a bit stuck with this puzzle (image)

8,5=100
10,4=80
16,2=?

I've tried 40,52,62,68 but no luck.

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1 Answer 1

5
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My suggestion would be

32

Following the rule

$a,b = \frac{ab^2}{2}$

Although bear in mind

Because we only have two previous equations there may be many valid answers that work.

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  • $\begingroup$ Brilliant! I'll accept this answer in 10 minutes. Many thanks! $\endgroup$ Jul 3, 2023 at 14:28

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