 Card Tricks
 Number Tricks

Addition Done Right
Grade level: 612
Difficulty level: Medium
 Volunteers from the audience write two numbers on a board.
 Beginning with these two numbers they construct a Fibonaccilike sequence, where each term starting with the third one is the sum of the
previous two terms.
 The volunteers are asked to write out the first ten terms and add them up.
 Before all the ten terms are written out, the magician starts working on the same task in his/her head, and has the answer faster than
the volunteers.
Detailed description
