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  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#1 Re: Exercises » About the Exercises » 2007-10-01 22:15:33

i cant solve one problem .......the question is as follows                                      is there any pair grater than 2 as x & x+2 such that no twin prime devides these two numbers

#2 Re: Exercises » About the Exercises » 2007-10-01 21:59:20

can u send me some questions on mathematics

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