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    If the product of n positive numbers is 1, then their sum isa)A positive integerb)divisible by nc)equal to n + 1nd)never less than n

    A couple of these are quickly seen off by very straightforward counterexamples.

    Is there meant to be another n at the end of (c)? Do you mean n + 1n or n + 1/n?

    Can you tell us where the question comes from?

    This is primarily a maths help thread.

    I believe there is another thread for posing maths questions or puzzles. If not, and this is your thing, then by all means start one.

    If you insist on posting puzzles here then please give them an accurate title so that people don't waste their time on them unless they are interested.
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