Shortcut for finding Cubes
Attention Friends... we've
came to know that this method is not working for some numbers... So
presently we are working on more efficient method than this... We advise
you to avoid this method....
Lets start with an example. Assume that you should find out the cube of
18. The general process is multiplying 18 to itself for 2 times (18 x 18
x 18). This process is time consuming and often people end up with the
wrong answer caused by confusion and hurry.
Ok, now lets use our method. here you should use the formula (a+b)3
= a3 +b3+
3a2b +3ab2. But here you should be little tricky. Have a look.........
Note : Here a or b should contain 3 digits. Or else, just put
zeroes to fill the gaps so that you can avoid confusion while doing
additions. So, the calculation will look like this.....
Here, please note that you are placing 0s to avoid confusion and to fill
the GAPS. If you have some 2 digit number (say 25) instead of that 1
in the above example, you should write that as 025.
Some Points to Remember :
- You should write a3 and b3 Side by side (no need to add them)
- You should start writing the 3a2b term exactly below from the a3 term.
- The 3ab2 term should end one number before the b3 term.
Thats all for now friends. This method may look little confusing
initially. Please do practice well so that you can understand the
advantage of this method. Happy reading :)
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