HOW TO FIND CUBE ROOT OF ANY NUMBER-LEARN SERIES
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HOW TO FIND CUBE ROOT OF ANY NUMBER-LEARN SERIES
Hi Bankersdaily Aspirants,
Learning is a step by step process and you should gradually progress in that to ace the process. As you all know we have started a new Learn Series to help with your preparations for various exams like IBPS PO , IBPS RRB Scale I officer , IBPS RRB Office Assistant , IBPS Clerk , IBPS SO , SBI PO , SBI Clerk , SBI SO and many other exams in this type. Nevertheless this series will also contribute you all the tips and tricks to every miscellaneous sections and also all the important topics which are asked in the exams. If you haven’t looked at the Learn series , Please Click the below link to learn the new concepts.
INTRODUCTION:
Before looking on how to Find Cube Root let us look
HOW TO FIND SQUARE ROOT OF A NUMBER
HOW TO FIND CUBE ROOT OF A NUMBER:
Aspirants,Before finding cube root of a number just remember a tip,
| UNIT DIGIT OF A GIVEN NUMBER | ITS EQUIVALENT UNIT DIGIT |
| 1 | 1 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 9 | 9 |
| 0 | 0 |
| 2 | 8 |
| 8 | 2 |
| 3 | 7 |
| 7 | 3 |
STEP 1:
Check whether the given number is Perfect Cube number.To Check this we have to look into only 1 condition,
That is the Power of Prime Factor of the given number should be 3
Example 1:
941192
The Prime Factor of Given number should be multiples of 3 then it is Perfect Cube Number(2*2*2)(7*7*7)(7*7*7)Therefore no term is left alone.It is Perfect Cube Number
STEP 2:
Take last 3 digit of the given number Starting from unit place
941192
The given number ends with 2 So,the unit digit will be 8(According to our table above)
STEP 3:
Leave last three digit from unit digit and take the Remaining number,
That is 941
The Nearest Perfect Cube number is 9³=729
So,the Perfect Cube number is 98³=941192
FINDING CUBE ROOT OF A IMPERFECT CUBE NUMBER:
Example 1:
3430
STEP 1:
TO CHECK THE NUMBER IS PERFECT CUBE OR NOT:
From this it is evident that the number is not a Perfect Cube
STEP 2:
1)Know the nearest Perfect Cube number.
Perfect Cube nearest to 3430 is 15³=3375
2)Find the Difference between the Given Number and the Nearest Perfect Cube Number
Given Number=3430-3375=55
3)Format for writing Imperfect Cube Number
Here Nearest Perfect Cube Number=15
Difference=55
=(15.08)³=3430
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