Write the answer on a piece of paper without letting anybody see itand seal it in an envelope. Have somebody hold the envelope and atthe end ask them to open it and reveal the number you wrote at thebeginning. Wow, Magic!
Guess how much money people have in their pockets! |
Without giving you anyinformation, ask a friend to count the value of some coins andwrite the amount on a piece of paper. Then ask your friend to:
For the grand finale, youask for the final answer. Take off the last digit and you will beable to work out how much the coins are worth!
Amaze your audience by working out not only their age but alsowhat size shoe they wear! Wow them even more by telling them howthe maths works. Give them the following directions but tell them not to show youany calculations: |
Look at the answer, thehundreds are the age and the remaining digits are the shoe size. Iffor instance somebody shows you 1105, there are 11 hundreds - theage, and the remaining digits 05 (or 5) show the shoe size.
Now, how on earth does that work?