### Questions (23)

 13 How to use the 'modulus' operator? 6 What is $x$, if $3^x+3^{-x}=1$? 5 Floyd's Triangle 3 If _ _ _ _ _ $9 \times 4 = 9$_ _ _ _ _, what's the former number? 2 Calculate length of one side given all other sides in a triangle.

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 1 If _ _ _ _ _ $9 \times 4 = 9$_ _ _ _ _, what's the former number? 0 Passing that ball on, where does it end up in? 0 Passing that ball on, where does it end up in? 0 What are the ways to solve cubic equations?

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 1 elementary-number-theory × 3 0 area × 3 0 contest-math × 8 0 power-towers × 3 0 sequences-and-series × 4 0 exponentiation × 3 0 trigonometry × 4 0 cubic-equations × 2 0 quadrilateral × 3 0 polynomials × 2

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