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CLASS 8th

Last update: 02/07/2026

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chapter 1 A Square and A Cube.

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E-book Class 8 Maths NCERT Ganita prakash

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1. If 𝑥 2 = 144 , then the value of 𝑥 is:
11 12 13 14
2. If a square number is divisible by 9, then the number itself must be divisible by:
2 3 6 9
3. The cube root of 1728 is:
10 11 12 13
4. If 𝑥 2 = 𝑦 3 , then both 𝑥 and 𝑦 must be:
Perfect squares Perfect cubes Perfect sixth powers Prime numbers
5. If 𝑥 2 + 𝑦 2 = 𝑧 2 , which of the following triples can represent ( 𝑥 , 𝑦 , 𝑧 ) ?
(3, 4, 5) (5, 12, 13) (8, 15, 17) All of the above
6. If the square of a number ends with 25, then the number must end with:
25 75 Either 75 or 25 None of these
7. The cube root of a 6-digit number is 38. What is the number?
54872 54782 57482 45782
8. The smallest number which is both a perfect square and a perfect cube is:
36 64 216 729
9. If the sum of two squares is also a square, then the numbers form a Pythagorean triple. Which of the following is not a Pythagorean triple?
(9, 12, 15) (7, 24, 25) (20, 21, 29) (10, 24, 26)
10. Which of the following numbers is a perfect cube?
3375 2744 4913 All of the above