+247 u know the trick get any number multiply it by two and add eight divide by two then subtract the original number equals four?
well, i figured out why it works and i did something cool to it... (it's my own little trick i made :) )
choose three numbers (eg. 3, 5 and 9)
get the first and second numbers and multiply them together, then add the third number.
once you have done this, divide your answer by the first number. (in this case it's 3.)
get your answer and subtract second number (in this case it's 5.)
your answer is the third number divided by the first number!!
this also works with decimals and even decimals that have infinite decimal places!!
