Activity Database

Activity Authors
Activity Circles
Click To Sort By
  • 3rd - 5th (1)
  • 6th - 8th (1)
  • For Teachers (1)
  • Algebra / Arithmetic (1)
  • Number Theory (1)
Supporting Materials
Supporting Materials
  • Facilitator Guides (1)
  • References (1)
Session Styles
Session Styles
  • Multiple Representations (1)
  • Problem Posing (1)
  • Problem Sets (1)
Mathematical Practices
Mathematical Practices
  • MP1 - Make sense of problems and persevere in solving them. (1)
  • MP3 - Construct viable arguments and critique others' reasoning. (1)

Mind Reading With Math


For the Math Mind Reading Trick, you’ll need a volunteer who’s willing to have their mind read. The person performing the trick holds out the four cards and askes their volunteer to pick a number (whole numbers only, no fractions allowed!) between 1 and 15 and keep it a secret. Next, the mind-reader asks the volunteer if their number is on the cards one-by-one. The volunteer answers the questions with yes or no answers, and with some magic and a little math, the mind-reader figures out their number!