book Maths Puzzle Numerical Ability

Hello. I am having serious trouble on this one. THE SUM OF THREE CONSECUTIVE ODD INTEGERS IS 639. WHAT ARE THE INTEGERS? Thank you.

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book Other Question

2*square root of 27 + square root of 48
can this problem be solved? I thought the radicals had to be the same. If it can be solved can you show me how?? The Find two consecutive odd integers whose sum is 0