Me: What's more cute, 1 plus 8 is 9, and so is 2 plus 7. 18 minus 27 is -9. Adding 18 and 27 would get 45 which btw if you add 4 and 5 together, you get 9 again!
Sister: That's because both 18 and 27 is in the 9 multiplication table.
Me: That's not hibatsuna fault other character is not in the 9 multiplication table.
