BdMO 2020 Regional Higher Secondary
You have 4 different two digit numbers. Among them, product of any 3 is a full square number. What can be the lowest number among these 4 numbers?
- MrCriminal
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Re: BdMO 2020 Regional Higher Secondary
Answer is
- Mehrab4226
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Re: BdMO 2020 Regional Higher Secondary
All four numbers must be square numbers. You can prove it using contradiction(might be a little tricky). So the smallest number of the four must be $16$.
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-Henri Poincaré
-Henri Poincaré