when Sally picks any number between 1 and 20, doubles it, adds 6, divides by 2 and subtracts 3, she always gets the number she s
tarted with. why?
2 answers:
I think it might be because 2 and 3 are factors of 6.
Lets say number is x
doubles it (2x)
adds 6 (2x+6)
divide it by 2 (2x+6=2(x+3) so 2(x+3) divided by 2=x+3)
subtract 3 (x+3-3=x)
becasue math is fun, brah
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