Math inMagic Out! PIR Thursday October 18, 2018 Dr. Lynda Colgan - - PowerPoint PPT Presentation

Math in…Magic Out!

• Dr. Lynda Colgan

Agenda

• I know your secret number
• I know your age
• I know your other secret number
• I can see right through a stack of dice

I Know Your Secret Number

A Baffling Prediction

Secret Number Magic

• 1. Pick your favourite number between 1 & 8
• 2. Multiply by 3
• 3. Add 3
• 4. Multiply by 3
• 5. You'll get a 2 digit number.....
• 6. Add the digits together
• 7. On the count of three…shout it out!!!

I Know Your Age (and something else!)

A Baffling Prediction

Breaking the Ice…

• Pick a number between 2 and 9
• Multiply by 2
• Add 5
• Multiply by 50
• If you have already had your birthday this year, add 1768
• If you have NOT had your birthday yet this year, add 1767
• Subtract the 4-digit year you were born (e.g., 2009)

I know your secret number!

1 to 63

1 2 3 4 5 6

Roll 'em, Roll 'em

Math Towers

X-ray Vision

Qeh?

eh?