Let us take a break from calculations and enjoy a small magical mathematics trick.
1. Think a number (any number). To keep it easy, think any number having 1 or 2 digit.
2. Now double this number i.e. multiple by 2.
3. Add 12 to the result
4. Divide the total by 2.
5. Subtract the original number from above result.
6. And you will always get '6' as final result.
Try this one with different numbers, and you will see that the sequence always produces the '6' as result ,no matter which number was originally selected.
For example, if the original number is 15.
1. 2 x 15 = 30
2. 30 + 12 = 42
3. 42 / 2 = 21
4. 21 - 15 = 6
You must be curious that how this magic trick is working. Following is the concept for this magic trick:
Let us take a number be x and the steps performed by us are:
2. 2x + 12
3.(2x + 12) / 2 = x + 6
4. x + 6 - x = 6
So, in last step, we see that whatever number we choose (as x) will finally result in '6' with above calculation. After knowing the formula, now you can change the answer by changing the formula. For example, if you want to change the answer to '4', then you add twice of that '4' i.e. '8' in the second step.
Enjoy this trick!!