Calculation Short tricks Calculate cube roots quickly!

(1)

Home /PO, Clerk, SO, Insurance/ SBI Clerk/ Article

Calculation Short tricks: Calculate cube roots quickly!

By Amrit Gouda | Updated : September 30th, 2021

1321 UPVOTE 125 COMMENTS LANGUAGE SHARE

Best tricks to calculate cube roots: In the Numerical Ability section of Banking exams,

calculation plays an important role to score high. Now, to strengthen it, you have to practice a lot.

Practising questions will increase your speed as well as accuracy. Speed is also dependent on short tricks as we use them in the exam to save time for other questions.

MORE

Best tricks to calculate cube roots: In the Numerical Ability section of Banking exams, calculation plays an important role to score high. Now, to strengthen it, you have to practice a lot.

Practising questions will increase your speed as well as accuracy. Speed is also dependent on short tricks as we use them in the exam to save time for other questions.

In the calculation, you must know the tables till 25 at your �ngertips. With this, learning squares and cubes till 25, square roots till 20 and cube roots till 10 is must. Remembering them will enhance your calculation skills. We have already shared the calculation short tricks of a square, cubes, and square roots. You can go through the tricks and prepare them well.

Attempt Quant Quiz Here

In the article, we will be discussing the short tricks to calculate the cube roots of the de�nite cube numbers. For this, you just have to remember the cubes till 10 to apply this technique.

Hi Aspirant Do you need help with SBI Clerk Preparation?

Live Class ^Live

Current Affairs : 24th Jan 2023 Join Now

(2)

Signup for Free Mock Test

Cubes of the numbers (1 to 10)

Numbers Cubes

1 1

2 8

3 27

4 64

5 125

6 216

7 343

8 512

9 729

10 1000

Live Class ^Live

(3)

Now, do you analyze anything from the above table?

Observation 1:

Unit digit of the numbers and their cubes is similar

1 1

4 64

5 12 5

6 21 6

9 72 9

10 100 0

So, always remember that, if you �nd a number who is a de�nite cube and carries the above- mentioned unit digits, then their cube roots will also have the same unit digits.

Observation 2:

Numbers having the unit digit 2 will have 8 as the unit digit in the cube and vice versa

Numbers having the unit digit 3 will have 7 as the unit digit in the cube and vice versa

2 8 3 2 7

8 51 2 7 34 3

Thus, keep in mind that if you �nd a number who is a de�nite cube and carries the unit digits as:

a. 2, then cube root will have unit digit as 8.

b. 8, then cube root will have unit digit as 2.

Remember the conclusions of the above observations. They will be used in the steps of calculating the cube roots.

Method to calculate cube roots of de�nite Cube numbers Let us discuss through an example:

Find the cube root of a number 59319.

Step 1: Divide the number by taking 3 rightmost digits in one part and remaining digits in

Live Class ^Live

(4)

another part. Then, from the unit or last digit of the cube, �nd the unit digit of cube root number.

Here the last digit of the cube is 9. Now, as per the above observation, the numbers having the unit digit 9 have the same unit digit in their cubes and vice versa. So, the unit digit of cube root will also be 9.

Step 2: Now consider the remaining digits of the number. Then �nd the smaller cube number to the remaining digit and write its cube root number.

Here, remaining digits: 59.

Smaller cube to 59 is 27.

Cube root of 27 is 3.

So, cube root of 59319 is 39.

So, with the help of just two simple steps, you can �nd the cube root of the number.

Cube root of 59319

59 31 9

27 or (3)³< 59 9

3 9

39

Let`s have some examples to understand it better.

Example 1: Find the cube root of 91125.

91 12 5

64 or (4)³< 91 5

4 5

45

Example 2: Find the cube root of 175616 Cube root of 175616

Live Class ^Live

(5)

175 61 6

125 or (5)³< 175 6

5 6

56

Example 3: Find the cube root of 300763

300 76 3

216 or (6)³< 300 7

6 7

67

474 55 2

343 or (7)³< 474 8

7 8

78

778 688

729 or (9)³< 778 2

9 2

92

Live Class ^Live

(6)

In this way, you can calculate the cube roots of the de�nite cube numbers easily. You don't have to write all the steps in the exam. Just calculate the steps in your mind and answer quickly.

In the upcoming articles, we will be sharing the short tricks of some other topics. Stay connected and keep going with practice.

Note: Using this technique, you can �nd only 2 digit cube root numbers.

Why BYJU'S Exam Prep Test Series?

• Unlimited access to 18+ Bank and Insurance Exam mock tests

• Mock Tests designed by Exam Experts.

• Detailed Performance Analysis.

Download the BYJU’S Exam Prep App Now.

The most comprehensive exam prep app.

#DreamStriveSucceed

UPVOTE COMMENT SHARE

Live Class ^Live

(7)

FAQs

How to calculate cube root of a number?

You can go through the article to have a complete understanding of this.

What is the short trick to �nd the cube root of a number?

What is the application of cube root tricks in bank exams?

How to improve calculation speed?

Related Posts

SBI Clerk Mains Memory Based Question Paper 15th January 2023, Download PDF

Jan 15

SBI Clerk Mains Exam Analysis 2023, 15th January: Di�culty Level, Questions Asked

Jan 15 | 1 upvotes

this is a testing post tile , ignore if visible.

Dec 8 | 7 upvotes

Comments WRITE A COMMENT

Load Previous Comments Pooja Paswan Jul 21, 2020

1 UPVOTE

Mujhe smjh m ni aaya��

1 REPLY

Vijay Alamuri Sep 2, 2020

0 UPVOTE How to �nd cube

0 REPLY

Mohan Rana Nov 25, 2020

1 UPVOTE

How to know last digit...

1 REPLY

Ramakanta Padhan Dec 15, 2020

1 UPVOTE

Thanks a lot@Sheetal Goyal

0 REPLY

Harsh Kumar Mar 22, 2021

1 UPVOTE

HOW TO KNOW THAT A NUMBER IS A DEFINITE CUBE..? THIS WILL SURELY FAIL

0 REPLY

Shambhavi Asthana Apr 22, 2021

1 UPVOTE Thx

0 REPLY

Subham Gupta Oct 4, 2021

0 UPVOTE Thank you....

0 REPLY

Fathima Oct 7, 2021

0 UPVOTE Thank You..

0 REPLY

Rekha Mar 27, 2022

0 UPVOTE

Mughe samagh nhi aayi ye trik

0 REPLY Hi Aspirant Do you need

help with SBI Clerk Preparation?

Live Class ^Live

(8)

PO, Clerk, SO, Insurance

Banking IBPS PO IBPS Clerk SBI PO IBPS SO SBI Clerk RBI IDBI SO IBPS RRB LIC

Featured Articles

IBPS Calendar 2023 Released, Download PDF and Check IBPS RRB, PO, Clerk, SO Exam Date 175 upvotes | 21 comments

IBPS RRB PO Interview Call Letter 2021 Out:

Download O�cer Scale 1, 2 & 3 Call Letter Here

342 upvotes | 350 comments

IDBI Assistant Manager Exam Analysis 04 September 2021 - Shift 1 Review, Di�culty Level, Questions

SBI Clerk 2020 3rd Waiting List Out, Check Provisionally Selected Candidates List PDF

Recent Quizzes

Quant Quiz - Missing Number Series - 23 January 2023

3.6K+ attempts 5 Questions | 4 mins

Start Quiz

1 AM Quiz (Coding Decoding)

500+ attempts 5 Questions | 5 mins

Start Quiz

Follow us for latest updates

0 UPVOTE Very useful

0 REPLY

Write a comment

Upcoming Bank Exams Bank Salary

Bank Question Papers Bank Syllabus Bank Mock Tests

Bank Online Coaching Bank Quizzes

Bank Practice Set

OUR APPS

BYJU'S Exam Prep: The Exam Preparation App

POPULAR EXAMS

UPSC DSSSB UGC NET RRB NTPC SSC CGL NDA GATE

Live Class ^Live

(9)

CDS CAT Exam SBI PO SSC JE RBI Grade B IBPS PO IBPS Clerk CLAT Exam

GOVT. EXAMS

HPCL Current Affairs SSC CHSL SSC MTS BARC

Indian Coast Guard AFCAT

CUET

Territorial Army IBPS RRB IIFT CMAT RRB Group D UPSC EPFO SBI Clerk IES Exam

STATE EXAMS

KPSC RPSC UPPSC BPSC MPSC MPPSC JPSC CGPSC UKPSC OPSC REET UPTET KSET WBCS MP TET HPSC

GradeStack Learning Pvt. Ltd.

Windsor IT Park, Tower - A, 2nd Floor, Sector 125, Noida,

Uttar Pradesh 201303 help@byjusexamprep.com

Live Class ^Live