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I am not able to understand why in the explanation, only prime numbers pairs are taken. since, it is not mentioned anywhere in the question about prime numbers pair.
Please Clarify.
If hcf of two numbers are given to be 2 and let us assume the numbers are 2x and 2y then 2x and 2y have to be co prime to each other. this is the actual procedure of such sums.
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I am not able to understand why in the explanation, only prime numbers pairs are taken. since, it is not mentioned anywhere in the question about prime numbers pair. Please Clarify.