“There, stand in that position, please, and look straight at that
notice while I take your measure.”
Customer reads the notice--
“Terms Cash.”
=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.
(1) 90 = 9 (2) 54 = 9 (3) 1458 = 18 = 9 (4) 135 = 9
Also, if these answers be multiplied by any number whatever, a
similar result will be produced.