EXAMPLE.
Suppose the number thought of be 6
1. Let him double it 12
2. Desire him to add to this a number you
tell him--say 4 16
3. To halve it 8
You can then tell him that if he will subtract from this the number he
thought of, the remainder will be, in the case supposed, 2.
NOTE.--The remainder is always half the number you tell him to add.
To Discover Two or More Numbers that a Person has Thought of.