4 the maths lovers...??? help!!!

evo... dont worry, we all r a bit strange @ times.
the reason 4 the 35 being exempt/ excluded, is because ne multiple of a number minus another multiple of the same number will result in a multipl of same number... i.e. 7x40 - 7x3 is still a multiple of 7... i.e. 280 - 35 is still a multiple of seven. therefore if one of the preceding brackets is a multiple of 7, then by subracting 35, the answer will still remain a multiple of 7. this can b explained easier, as 7 is a common factor, and therefore, if ne of the brackets was 7, then the equation could be factorised one step further by extracting 7 from the brackets as the common term

 

righto. Now thats 1 simple solution in the whole thread! N thanks for the pm zing, it helped too.

 

thanks a lot zing... had maths 2day, u were rite... teacher had asked a trick question... idiot

 

waah!!!!waah!!!!

 

the question ws meant 2 b an example of proof by contradiction, i think

 

No guyz, sorry. Busted my head open, 2 hrs of nothing but maths tricks n logics, but couldn't find anything to put together the right way. Its a fake