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Cool Math Trick . . . Where your answer will be 37!

2/22/2017

1 Comment

 
There's something about math tricks that just make math more interesting to kids. I find it a great sneaky way to add in that extra bit of math in a day without the groans!

Here is another cool math trick that I would like to share, it's one where your answer will always be 37! Of course, if the calculations are done correctly. If the answer is not 37, then a mistake has happened somewhere along the way.

Step 1: Think of a three digit number where all of the digits are the same,  e.g. 111, 222, 333, 444.

For example I'm going to choose 777.

Step 2: Add the three digits together

For my example (777) 7 + 7 + 7 = 21

Step 3: Divide the number that you came up with in Step 1 by the result you ended up with in Step 2.
(So Long Division Skills are needed here. For younger students you may wish to allow them to use a calculator if this is too difficult.)

For my example  . . . 777 divided by 21

which EQUALS 37!



If you like math tricks, you can find more on my website, just . . . 
CLICK HERE for more Cool Math Tricks!
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1 Comment

Cool Math Trick - Where your Answer is Always 2!

12/29/2016

11 Comments

 
Here's another cool math trick to teach your kids! Get them to try it with lots of different numbers to sneak in some extra math practice, whilst amazing them that the answer is always 2! 

If the answer isn't 2, then a calculation mistake was made and so needs to be redone. You could get your students to show the math on a piece of paper to check.

A fun and challenging activity that you could give your students is to get them to try and explain how and why this trick works.

Example of using this trick:

Step 1: I choose 7
Step 2: Multiply by 3 = 21
Step 3: Add 6 = 27
Step 4: Divide by 3 = 9
Step 5: 9 - 7
           = 2
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11 Comments

Cool Math Trick!

10/26/2016

96 Comments

 
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Here's another cool math trick to teach your kids! Get them to try it with lots of different numbers to sneak in some extra math practice, whilst amazing them that the answer is always 5! 

If the answer isn't 5, then a calculation mistake was made and so needs to be redone. You could get your students to show the math on a piece of paper to check.

A fun and challenging activity that you could give your students is to get them to try and explain how this trick works.

Example of using this trick:

Step 1: I choose 100
Step 2: Double it = 200
Step 3: Add 10 = 210
Step 4: Halve it = 105
Step 5: 105 - (100)
           = 5

96 Comments

Another Cool Math Trick!

9/19/2016

0 Comments

 
I love math tricks and so do my students! They are a great way to get kids thinking about numbers and operations whilst adding a bit of 'magic' to the process. Below is a fantastic math trick you could try with your kids that will get them multiplying, adding, doubling, dividing and subtracting . . . and if done right the answer will always be 15 no matter what number was chosen in step 1!

I like to use these at the start of a math lesson for a quick math mental warm up, or if there are a few precious minutes to spare that need to be filled with something educational. 

I've included an example of the process underneath the image below.
Picture

Example:

Step 1: I'm thinking 100
Step 2: 100 X 3 = 300
Step 3: 300 + 45 = 345
Step 4: Double 345 = 690
Step 5: 690/6 = 115
Step 6: 115 - 100 = 15!


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