DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

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Unit 2 Brain Teaser | DAV Solution Class 8 Secondary Mathematics

Q1A. Tick the correct option.

(i) Cube of 0.1 is equal to

(a) 1.11 (b) 0.001 (c) 0.101 (d) 0.01

(ii) The smallest number by which 1944 should be multiplied so that jt becomes a perfect cube is

(a) 3 (b) 2 (c) 5 (d) 4

(iii) Value of….

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

(a) 10 (b) 1000 (c) 100 (d) none of these

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

(a) 1 (b) 0.1 (c) 0.11 (d) 0.09

(v) Cube of….

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions
DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q1B. Answer the following questions.

(i) Find the number whose cube is 1728.

(ii) Find the value of…

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

(iii) Find the cube root of 0.000001.

(iv) What is the smallest number by which 1715 should be divided so that the quotient is a perfect cube?

(v) Evalute:

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions
DAV Class 8 Maths Chapter 2 Brain Teaser Solutions
DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q2. Prove that if a number is tripled, then its cube is 27 times the cube of the given number.

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q3. Write cubes of all natural numbers from 1 to 10 and observe the pattern.

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q4. Find the cubes of:

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q5. Find the value of the following cube roots:

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q6. Find the smallest number which when multiplied with 3600 will make the product a perfect cube. Further, find the cube root of the product.

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q7. Evaluate:

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions
DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

Q8. Guess the cube root of the following numbers.

(i) 6859 (ii) 12167 (iii) 32768.

DAV Class 8 Maths Chapter 2 Brain Teaser Solutions

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