# Birthday Math Trick

Ready to spice up math class - Pretty cool birthday math trick!

Birthday Math Trick

Note: It's a good idea to try this trick out on yourself first, using your own birthdate.

How To Perform the Math Trick:

There's an example follow the steps below.

• Add 18 to the month they were born
• Multiply by 25
• Subtract 333
• Multiply by 8
• Subtract 554
• Divide by 2
• Multiply by 5
• Multiply by 20
• Add only the last two digits of their birth year
• Subtract 32940 to get their birthday!

That's some Pretty Cool Math Stuff!

Here's an example below...

Let's suppose someone has a birthdate of August 22, 1964.

So we want to use the format of month/day/year so this birthdate would be 08/22/64.

Notice we only used two digits for the year.

1) 18 + 8 = 26

2) 26 x 25 = 650

3) 650 - 333 = 317

4) 317 x 8 = 2536

5) 2536 - 554 = 1982

6) 1982 / 2 = 991

7) 991 + 22 = 1013

8) 1013 x 5 = 5065

9) 5065 + 692 = 5757

10) 5757 x 20 = 115140

11) 115140 + 64 = 115204

12) 1295204 - 32940 = 82264

And there you have it....

8 . 22 . 64 which is the same as August 22nd, 1964!

If you enjoyed that trick you probably also like this bit of birthday math trivia.  Also notice the next two links below will take you to the main math tricks and trivia pages.

Kids don't want the same ol' boring math routine. That's why keeping math interesting and engaging with math tricks, puzzles, games, etc. we help motivate students to think more positive about math. I mean, don't we usually feel good about the things if we're having fun?

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Go to main Math Trivia page

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