A divination in three movements

The Nine Sign

Keep your number to yourself. I need only know that you hold one.

Draw out your number.

Three small operations, done quietly in your head. I will be looking the other way.

  1. ✦ Think of any two‑digit number.
    anything from 10 to 99
  2. ✦ Add its two digits together.
    47 → 4 + 7 = 11
  3. ✦ Subtract that sum from your number.
    47 − 11 = 36 ← hold this one
Rather not do it in your head?
Type a number and I’ll do the arithmetic.

Find it in the table.

Every number wears a sign. Look yours up, fix the sign in your mind, and hold it there.

Then it is already known.

your sign

This is the sign you were holding. Think of another number and I will find that one too.