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10 May 2025, 22:11
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MS26
I think this is the shortcut solution already - I can’t think of a better one
10 May 2025, 22:49
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I think that 40 can be a solution here. What if I assume a = 40, then b^2 = 10,000 which is still a perfect square. And b^2 is divisible by 40.
@Bunuel
@Bunuel
10 May 2025, 23:12
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You are taking a specific case here. If you consider a =10, b^2 = 2500, then b^2 is not divisible by 40 but it is still divisible by all other options. In such questions, take the worst case scenario and not the best one.
