Question

2) The reciprocal of (T) is
tie
3) Find the cube of 0.3 gib 10
4) Multiply 13xy by 4x? y
190 mm​

Answer 1

Answer:

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Step-by-step explanation:

NCERT Exemplar Class 8 Maths Chapter 3 Square-Square Root and Cube-Cube Root

Multiple Choice Questions

Question1 196 is the square of

(a) 11 (b) 12

(c) 14 (d) 16

Solution.

(c) Square of 11 = 11 x 11 = 121

Square of 12 = 12 x 12 = 144

Square of 14 = 14 x 14 = 196

Clearly, 196 is the square of 14

Question 2 Which of the following is a square of an even number?

(a) 144 (b) 169

(c) 441 (d) 625

Solution.

ncert-exemplar-problems-class-8-mathematics-square-square-root-and-cube-cube-root-1

Thus, 144 is a square of an even number.

Alternate Method

We know that, square of an even number is always an even number. Hence, 169, 441 and 625 are not even numbers. So, only 144 is an even number, which is the square of 12.