Seudónimo Seudónimo

23-05-2017
Mathematics

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Which of the following numbers is prime?
133 143 153 163

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Forgetsalot Forgetsalot

23-05-2017

133 is dividable by 7 to get 19
143 is dividable by 11 to get 13
153 is dividable by 3 to get 51
so the only number left is 163

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