Objective: To spark interest in math by ‘guessing’ the observer’s number.
Materials: Magic Math Mind cards
Choose a participant, an “audience member”. Ask them to think of a number between 1 and 63.
Have them look at the cards and sort the cards into the stack that does have the number, and those that do not.
The trick is to take the pile of cards that contains their number and simply add the upper-left number from each card. The sum of these values will be the number that was chosen.
These cards are available abundantly, but this particular set was offered by “Diary of a Grumpy Teacher” blog as a freebie back in 2014. http://diaryofagrumpyteacher.blogspot.com/2014/04/freebie-friday-magic-number-cards.html Check ‘em out!