The Puzzle King / Amusing arithmetic, book-keeping blunders, commercial comicalities, curious "catches", peculiar problems, perplexing paradoxes, quaint questions, queer quibbles, school stories, interesting items, tricks with figures, cards, draughts, dice, dominoes, etc., etc., etc.

by John Scott

NUMBER 9.

If two numbers divisible by 9 be added together the sum of the figures in the amount will be either 9 or a number divisible by 9.

Example:	54
(1)	36
	90

If one number divisible by 9 be subtracted from another number divisible by 9, the remainder will be either a 9 or a number divisible by 9.

Example:	72
(2)	18
	54

If one number divisible by 9 be multiplied by another number divisible by 9, the product will be divisible by 9.

Example:	54
(3)	27
	1458

If one number divisible by 9 be divided by another number divisible by 9, the quotient will be divisible by 9.

Example:	27	) 3645
(4)
		135

In the above examples it is worth noting that the figures in each answer added together continually produce 9.