Do you know? From number 1 to 9 (not counting 0) , any number
will add up to 9. This applies to for e.g. 39 . From the number 39,
take 3+9=12. So, minus 12 , 39 - 12 = 27 , 27 : 2+7 = 9.
Still dont believe?
Take 98.
98 : 9+8 = 17 Therefore, 98 - 17 = 81 , therefore , 81 : 8+1 =
9.
Cool. 