All Courses
Get the App Signup / Login
Sign in Open App
Class 8 Exam  >  Class 8 Tests  >  Test: Cubes And Cube Roots- 2 - Class 8 MCQ

Test: Cubes And Cube Roots- 2 - Class 8 MCQ


Test Description

30 Questions MCQ Test - Test: Cubes And Cube Roots- 2

Test: Cubes And Cube Roots- 2 for Class 8 2024 is part of Class 8 preparation. The Test: Cubes And Cube Roots- 2 questions and answers have been prepared according to the Class 8 exam syllabus.The Test: Cubes And Cube Roots- 2 MCQs are made for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Cubes And Cube Roots- 2 below.
Solutions of Test: Cubes And Cube Roots- 2 questions in English are available as part of our course for Class 8 & Test: Cubes And Cube Roots- 2 solutions in Hindi for Class 8 course. Download more important topics, notes, lectures and mock test series for Class 8 Exam by signing up for free. Attempt Test: Cubes And Cube Roots- 2 | 40 questions in 40 minutes | Mock test for Class 8 preparation | Free important questions MCQ to study for Class 8 Exam | Download free PDF with solutions
Test: Cubes And Cube Roots- 2 - Question 1
Save

Which of the following is not a perfect cube ?

Test: Cubes And Cube Roots- 2 - Question 2
Save

The cube of 4 is _______________.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Cubes And Cube Roots- 2 - Question 3
Save

The value of 53 is __________.

Test: Cubes And Cube Roots- 2 - Question 4
Save

The cube of an even number is always ____________.
Test: Cubes And Cube Roots- 2 - Question 5
Save

The cube of an odd number is always __________.
Test: Cubes And Cube Roots- 2 - Question 6
Save

Each prime factor appears _________ times in its cube.
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 6

True
If a3 is the cube and m is one of the prime factors of a. Then, m appears three times in a3.

Test: Cubes And Cube Roots- 2 - Question 7
Save

Which of the following is Hardy-Ramanujan Number ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 7
This story is very famous among mathematicians. 1729 is sometimes called the “Hardy-Ramanujan number”.
There are two ways to say that 1729 is the sum of two cubes. 1x1x1=1; 12x12x12=1728. So 1+1728=1729 But also: 9x9x9=729; 10x10x10=1000. So 729+1000=1729 There are other numbers that can be shown to be the sum of two cubes in more than one way, but 1729 is the smallest of them.
Ramanujan did not actually discover this fact. It was known in 1657 by a Frenchmathematician Bernard Franicle de Bessy.

But it got famous after the ramanujans above conversation.

So it's famously known as Ramanujan Number.

Test: Cubes And Cube Roots- 2 - Question 8
Save

By which smallest natural number 392 must be multiplied so as to make the product a perfect cube ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 8


392 = 2 × 2 × 2 × 7 × 7
Hence the number should be multiplied by 7 to make it a perfect cube.

Test: Cubes And Cube Roots- 2 - Question 9
Save

The smallest natural number by which 243 must be multiplied to make the product a perfect cube  is __________. 
Test: Cubes And Cube Roots- 2 - Question 10
Save

The smallest natural number by which 704 must be divided to obtain a perfect cube is
Test: Cubes And Cube Roots- 2 - Question 11
Save

The smallest natural number by which 135 must be divided to obtain a perfect cube is
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 11

 we have 135 =  3 x 3 x 3 x 5

Grouping the prime factors of 135 into triples, we are left over with 5.
∴  135 is not a perfect cube
Now, [135]divided by5 = [ 3 x 3 x 3 x 5] divided by5
or  27 = 3 x 3 x 3
i.e. 27 is a perfect cube.
Thus, the required smallest number is 5

Test: Cubes And Cube Roots- 2 - Question 12
Save

Which of the following is not a perfect cube ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 12

Test: Cubes And Cube Roots- 2 - Question 13
Save

The expansion of a3 is ___________.
Test: Cubes And Cube Roots- 2 - Question 14
Save

What will be the unit digit of the cube of a number ending with 2 ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 14
- To find the unit digit of a number ending in 2 when cubed, we can simply cube the unit digit 2.
- The calculation is: 2 x 2 x 2 = 8.
- Therefore, the unit digit of the cube of any number ending with 2 is 8.
- This means if you take a number like 12, 22, or 52, their cubes will all have a unit digit of 8.
Test: Cubes And Cube Roots- 2 - Question 15
Save

What will be the unit digit of the cube of a number ending with 4 ?
Test: Cubes And Cube Roots- 2 - Question 16
Save

What will be the unit digit of the cube of a number ending with 6 ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 16

Test: Cubes And Cube Roots- 2 - Question 17
Save

A cuboid has dimensions 5cm, 2cm, 5cm. How many such cuboid will be needed to form a cube ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 17

Given, sides of a cuboid are 5cm, 2cm and 5cm
Volume of cuboid =5*2*5 = 50 cm3
Let the side of the cube formed with
minimum number of cuboids = x
Hence volume of the cube = x3
Number of cuboids required = n
Hence n*50 = x3
Now, n*50 must be perfect cube
n*50 = n*2*5*5
So, minimum value of n = 2*2*5 = 20
Hence, the number of cuboid will be
needed to form a cube is 20

Test: Cubes And Cube Roots- 2 - Question 18
Save

How many cuboids of dimensions 15cm, 30cm,15cm will be needed to form a cube ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 18
Given cuboids of dimensions 15cm, 30cm ,15cm

LCM(15, 30, 15) = 30

Since 15*2 = 30

        30*1 = 30

and  15*2  = 30  {since a cube has all the dimensions are same}

So, the number of cuboids required to form a cube = 2*1*2 = 4

So, by using 4 cuboids, we can form a cube having side 30 cm each.
Test: Cubes And Cube Roots- 2 - Question 19
Save

729 is the value of  _______________.
Test: Cubes And Cube Roots- 2 - Question 20
Save

Which of the following is a perfect cube ?
Test: Cubes And Cube Roots- 2 - Question 21
Save

What is the volume of a cube whose edge is 2cm ?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 21
Volume of cube=2×2×2=8
Test: Cubes And Cube Roots- 2 - Question 22
Save

The symbol for cube root is __________.
Test: Cubes And Cube Roots- 2 - Question 23
Save

The cube root of 512 is ________.
Test: Cubes And Cube Roots- 2 - Question 24
Save

The value of ∛343 is-
Test: Cubes And Cube Roots- 2 - Question 25
Save

Which of the following is true for any natural number n? for n>1
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 25

Take any natural number(except 1). This identity would hold for any natural number.
Natural numbers are 1,2,3,4,5____ upto infinity with all positive terms.

Test: Cubes And Cube Roots- 2 - Question 26
Save

If the volume of a cube is 125 cm3 then what would be the length of its side?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 26

Test: Cubes And Cube Roots- 2 - Question 27
Save

What will be the unit digit of the cube root of a number ends with 8?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 27

To determine the unit digit of the cube root of a number that ends in 8, consider the following:

  • When you cube a number with a unit digit of 2, the resulting cube ends with 8. For example, 23=82^3 = 823=8.

Therefore, if a number ends with 8, the unit digit of its cube root will be 2.

So, the correct answer is:

1. 2

Test: Cubes And Cube Roots- 2 - Question 28
Save

What will be the unit digit of the cube root of a number ends with 2?
Test: Cubes And Cube Roots- 2 - Question 29
Save

What will be the unit digit of the cube root of a number ends with 3?
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 29

for example like 343 so its cube root will be 7
because 73 will always have 3 as unit digit

Test: Cubes And Cube Roots- 2 - Question 30
Save

For a number ending with 7, the unit digit of its cube is equal to:
Detailed Solution for Test: Cubes And Cube Roots- 2 - Question 30

If the unit digit is 7, the cube will have unit digit as 7×7×7 = 343

So, the unit digit will be 3.

View more questions
Information about Test: Cubes And Cube Roots- 2 Page
In this test you can find the Exam questions for Test: Cubes And Cube Roots- 2 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Cubes And Cube Roots- 2, EduRev gives you an ample number of Online tests for practice

Top Courses for Class 8

Download as PDF

Top Courses for Class 8

Important Questions for Cubes And Cube Roots- 2

Find all the important questions for Cubes And Cube Roots- 2 at EduRev.Get fully prepared for Cubes And Cube Roots- 2 with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Cubes And Cube Roots- 2 syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Cubes And Cube Roots- 2 resources.

Cubes And Cube Roots- 2 MCQs with Answers

Prepare for the Cubes And Cube Roots- 2 within the Class 8 exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Cubes And Cube Roots- 2

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Cubes And Cube Roots- 2 with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup