Today, I am sharing the shortcut tricks by which you can make cube of a number. In my previous two article I shared you the shortcut tricks of “how to find square of any number”. But today I am able to show you this trick only for some numbers (1-20 & 90-110). Just follow the rules how number makes cube. I am trying to find out the shortcut trick for other numbers. Whenever I will find it, I will share you.

## How to Find Cube of a Number

#### Rule: 1 Number from 1 to 10

Please don’t use any rules for these numbers. Try to memorize.
1

^{3 }= 1
2

^{3 }= 8
3

^{3 }= 27
4

^{3 }= 64
5

^{3 }= 125
6

^{3 }= 216
7

^{3 }= 343
8

^{3 }= 512
9

^{3 }= 729
10

^{3 }= 1000#### Rule: 2 Number Close to 10

**10 + 3X | 3X**

^{2}|**X**(X will take -Value when the number is below 10 or vice versa & the digit will be one after | )

^{3}
If
we find the cube of 12 (close to 10), then

12

^{3}= 10 + 3X | 3X^{2}| X^{3}
12

^{3 }= 10 + 3.2 | 3.2^{2}| 2^{3}
12

^{3 }= 10 + 6 | 3.4| 8
12

^{3 }= 16 | 12| 8
12

^{3 }= 1728
If
we find the cube of 16 (close to 10), then

16

^{3}= 10 + 3X | 3X^{2}| X^{3}
16

^{3 }= 10 + 3.6 | 3.6^{2}| 6^{3}
16

^{3 }= 10 + 18 | 3.36| 216
16

^{3 }= 28 | 108| 216
16

^{3 }= 28 | 129| 6
16

^{3 }= 4096#### Rule: 3 Number Close to 100

**100 + 3X | 3X**

^{2}|**X**(X will take -Value when the number is below 100 or vice versa & the digit will be two after | )

^{3}
If
we find the cube of 105 (close to 100), then

105

^{3}= 100 + 3X | 3X^{2}| X^{3}
105

^{3 }= 100 + 3.5 | 3.5^{2}| 5^{3}
105

^{3 }= 100 + 15 | 3.25| 125
105

^{3}= 115 | 75| 125
105

^{3}= 115 | 76| 125
105

^{3 }= 1157625
If
we find the cube of 96 (close to 100), then

96

^{3}= 100 + 3X | 3X^{2}| X^{3}
96

^{3 }= 100 - 3.4 | 3.4^{2}| -4^{3}
96

^{3 }= 100 - 12 | 3.16| -64
96

^{3}= 88 | 48 | -64
96

^{3}= 88 | 47 | 36
96

^{3 }= 884736#### Rule: 4 Number Close to 20, 30, 40, and 50

*Coming soon.*

**N.B. : Don’t try these tricks for other numbers.**

### Questions from this topic:

**Q.1:**105

^{3 }+ 15

^{3}+ 5

^{3}= ?

**Q.2:**95

^{3 }- 5

^{3}+ 15

^{3}= ?

**Q.3:**109

^{3 }= ?

**Q.4:**1

^{3 }+ 11

^{3}= ?

*Thanks.*

*SBI PO Smart Prep Kit by Ramandeep Singh - Get here*### Oliveboard Test Series(Recommended)

####
*Bank Exams Today Notes*

*Bank Exams Today Notes*

## 0 comments:

## Post a Comment

Thanks for commenting. It's very difficult to answer every query here, it's better to post your query on IBPSToday.com