A Person Having An Even Number Of Shillings In One Hand And An Odd
Number in the other, to tell in which hand the odd or even Number is.
You desire the person to multiply the number in his right hand by an
odd figure, and the number in his left by an even one; and tell you if
the products, added together, be odd or even. If even, the even number
is in the right hand; if odd, the even number is in the left. For
instance,
I. Number in the right In
the left hand odd 7
hand is even 18 Multiply by 2
Multiply by 3 ----
---- Product 14
Product 54 ----
Add the Product of
the left hand 14
----
Which produces a
total of 68
II. Number in the right In the left hand even 18
hand is odd 7 Multiply by 2
Multiply by 3 ----
---- Product 36
Product 21
Add the Product of
the left hand 36
----
Which produces a
total of 57