The Number You're Thinking Of

Pick a two-digit number, do a little arithmetic with it, and I'll tell you the symbol you're looking at.

Take any two-digit number. Not a special one — the first one that comes to mind is fine. Add its two digits together, then subtract that total from the number you started with.

Hold on to the answer. Find it in the grid and look at the symbol beside it. Don't tell me anything. Look at it, and I'll say it out loud.

How it works

Subtract the sum of a two-digit number's digits from the number itself and the result is always a multiple of nine. Ten times the tens digit plus the units digit, minus both digits, leaves nine times the tens digit — every time. So the grid only has to agree with itself: every multiple of nine carries the same symbol, and the other entries are there to keep you from noticing. Try it with a friend.

Props
Nothing — it works in your head
Difficulty
Easy to learn

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Close-up magic, mentalism and stage shows for corporate events, parties, churches and theatres.

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Based in Milwaukee · performing across Wisconsin · travelling nationwide