Math Club

Math Tricks Sept. 28-Oct. 2

CHECK OUT THIS WEEKS MATH TRICKS!

Friday, Oct. 2nd, 3pm

This is an online event.

Math Trick #1. Finding someone's age

Math Trick #2. Determine someone's birthday

Math Trick #3. Reading someone's mind with math

Finding someone's age

  • Ask the person to multiply the first number of his or her age by 5.
  • Tell them to add 3.
  • Now tell them to double this figure.
  • Finally, have the person add the second number of his or her age to the figure and have them tell you their answer.
  • Deduct 6 and you will have their age.
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Determine someone's birthday

Just follow the steps with a calculator or by hand for building math skills! Go ahead and try the trick without cheating!

  • Add 18 to your birth month
  • Multiply by 25
  • Subtract 333
  • Multiply by 8
  • Subtract 554
  • Divide by 2
  • Add your birth date
  • Multiply by 5
  • Add 692
  • Multiply by 20
  • Add only the last two digits of your birth year
  • Subtract 32940 to get your birthday!
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Reading someone's mind with math

Just follow the steps with a calculator or by hand for building math skills! Go ahead and try the trick without cheating!

  • Tell the person to chose a number between 1-10.
  • Tell them to multiply their number by 2.
  • Ask them to multiply the new number by 5.
  • Have them divide their current number by their original number.
  • Instruct them to subtract 7 from their current number.
  • "Guess" the answer! If the prior steps were done correctly, the right answer will always be 3.
    • For example, if your friend chooses 3: 3x2=6. 6x5=30. 30/3=10. 10-7=3.
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