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Fun and Cool Ways To Learn About Math

Learning about Math can be fun as there are several interesting ways to demonstrate Math. Here are 5 fun and interesting ways to illustrate how math works.

1) Times 9 with your hands

One of my favorite tricks growing up was the 9 times table trick. If you spread out your 10 fingers, and move 1 of your fingers down. So, let's say you move down your 4th finger. If you count the fingers to your left - you of course will have 3 fingers. If you count the fingers to the right of the finger you moved down - you will have 6 fingers. So, you moved the 4th finger down - and you have 3 fingers to your left, and 6 to your right. That equals 36 - which of course is 9 times 4. If you moved down your 7th finger, you'd have 6 fingers to your left, and 3 fingers to your right - which of course would give you 63 which is what 7 times 9 is.

Once you try this out and see how it works - you'll never again wonder what 9 times any number is.

2) Learning if a number is divisible by a certain number

We often ask students to tell us if a certain number is divisible by another number. Fortunately for students, there are some shortcuts to make it easier to answer this questions. Here are some rules to follow:

- If the sum of each digits in a number is divisible by 3 - then the number is divisible by 3. So 93, for example, 9+3 = 12 , and since 12 is divisible by 3 so too is 93.
- If the last 2 digits of a number are divisible by 4 - then the number is divisible by 4.
- If the last digit of a number is 5 or 0 - then it is divisible by 5. If the last digit is not divisible by 5 or 0 - then the digit is not divisible by 5. 10 is even more simple - if the last digit is divisible by 0 - than it is divisible by 10.
- If the number is divisible by 2 and by 7 - then it is divisible by 14. If the number is divisible by 3 and by 5 - then it is divisible by 15.
- If a number is divisible by 5 and by 4 - than it is divisible by 20. At the same time, if a number isn't divisible by both 5 and 4 - then it is not divisible by 20.

3) Two people with the same birthday

This is a more complex math riddle but it is true. The birthday paradox is the probability that two people in a room of many people will have the same birthday. Many people do not believe the fact that if there are just 23 people in a room - that there is a 50% probability that two of the people have the same exact birthday. And if there are 57 people in the room - the probability that two people have the same birthday climbs all the way to 99%.

This doesn't seem to be factual - but it is. So, this is a math problem that can help one to understand probability as it is always interesting to test math concepts on real questions.

4) Common Square Roots

Square roots are one of the most complex math problems students must figure out. If you learn the basic square roots early - it will be easier to understand and work on more complete square roots at a later age.

Here are the most common 10 square roots:
Square root of 1 is 1
Square root of 4 is 2
Square root of 9 is 3
Square root of 16 is 4
Square root of 25 is 5
Square root of 36 is 6
Square root of 49 is 7
Square root of 64 is 8
Square root of 81 is 9
Square root of 100 is 10

5) The Sibling Calculation

Here is a cool math game to play. Multiply your age by 2. Add 10 - and then multiple that number by 5. Then, add the number of siblings that you have. Then subtract 50. Look at the final answer - the first 2 digits are your age and the last digit is the number of siblings that you have.

This is a fun game that you can do for other people as well. The best thing about a game like this is that your math skills will improve through playing it.

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