The sum of all the elements in the set n 1,2, ,100 H.C.F. of n and 2040 is 1 is equal to (JEE Main 2021)

JEE Main Mathematics question

The sum of all the elements in the set is equal to (JEE Main 2021)

Answer: 1251

, so we need not divisible by 2, 3, 5 or 17. By inclusion–exclusion on sums (or

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Question ID VK-003281