# 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....

In our last posts we've discussed the method of finding Squares (read that post Here). In this post we shall discuss the method of finding cubes. This is very easy and simple method. You just have to put little concentration while learning and should do little practice so that you can do the process in a easy way mentally. And another thing you should keep in mind is, we are posting the step by stem inorder to make you understand the process in detail, but you SHOULD do most of these steps MENTALLY and only should put some important final results on paper. Now lets have a look at the method. In earlier method of finding squares we'd discussed finding the squares with the formula (a+b)2 , here we shall use the formula (a+b)3
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) = 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.
Lets see another example,

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 :)

1. nice one...

2. Hi i am unable to understand this process ...

1. Which point you are unable to understand? Or do you feel the entire process confusing?

2. some solutions for 23 cube and 29 cube .. the answer is not geting as per process

3. Well, therez some problem with this method Sita, thats the reason we've updated a caution message. We'll try to upload a new method soon..

Good Day

3. Hi got its its vry cool

4. What about in case if we have no as 226 and 8828 and we have to find cube? How we have to calculate it through this technique.

1. If you want to use this technique for 3 digits and 4 digits just divide those digits into 2 parts. The first part will b "a" and the second part will be "b". In your example you can treat 22 as a and 6 as b. Same logic with the second example too

5. l want steps for 55 cube.. i done it but i got wrong answer... please do the sum for me..

1. 125 125
3 75
37 5
----------
166 375

2. 1 2 5 1 2 5
3 7 5
3 7 5
------------------------------------
1 6 6 3 7 5

6. its not working for 29cube

1. 8 729
4 86
10 8
---------
24 389

2. But, the sum of 8729 + 486 + 108 = 9323 only
not 24389

3. but the sum of 8729 + 486 + 108 = 9323...
not 24389

4. write like this.....

8729
1 08
486
-------------------------
24389
------------------

5. 8 7 2 9
1 0 8
4 8 6
---------------------------
2 4 3 8 9

7. mam really its nice bt for some number its not working plz give other short way for them

8. It is very confusing,, I can share easy method to find cube..............

9. thank u some much sir it is best site

10. Hi friends the method is like this,

The last digit of the 3a2b term shud b below the 3rd term from right, and the last digit of the 3ab2 term shud b below the 2nd term from right... After that add the and you will get the correct answer...

11. thanku sir ,i searched in many sites but finally i got it from urs

12. CONFUSION HAI IS TRICK ME....

13. confusion hai is shortcuts trick me. can't find the cube of 58,46,49 etc..

14. Plz upload short cut method to find cube roots

15. Plz upload short cut methods to find cube roots...