CBSE Class 8 Mathematics Square And Square Roots Worksheet Set B

Question. What is the least perfect square which is divisible by 2, 4 and 6 ?
(A) 36
(B) 64
(C) 16
(D) 18
Answer : A

Question. What is the number of digits in the square root of 390625 ?
(A) 4
(B) 6
(C) 5
(D) 3
Answer : D

Question. Find the approximate value of 1 + √0.01 / 1-√0.1
(A) 0.6
(C) 1.6
(B) 1.1
(D) 1.7
Answer : C

Question. If x * y = √x² + y² , find the value of (1 * 2√2)(1 * -2√2)
(A) -7
(B) 0
(C) 2
(D) 9
Answer : D

Question. Evaluate

(A) 3
(B) 6
(C) 5
(D) 6.
Answer : B

Question. What is the least perfect square exactly divisible by each of the numbers 6, 9, 15 and 20?
(A) 3600
(B) 900
(C) 400
(D) 225
Answer : B

Question. The sides of a rectangular field are 80 m and 18 m respectively. What is the length of its diagonal ?
(A) 84 m
(B) 98 m
(C) 82m
(D) 86 m 
Answer : C

Question. What is the value of (501)²- (500)² ?
(A) 1
(B) 101
(C) 1001
(D) 100
Answer : C

Question. Which of the following is a Pythagorean triplet?
(A) (6, 8, 1 0)
(C) (5, 12, 18)
(B) (3, 4, 7)
(D) (2, 3, 6)
Answer : A

Question. What is the value of 1 + 3 + 5 + 7 + 9 +...............+ 25?
(A) 196
(B) 625
(C) 225
(D) 169
Answer : D

Question. What is the smallest number by which 396 must be multiplied so that the product is a perfect square ?
(A) 5
(C) 3
(B) 11
(D) 2
Answer : B

Question. Find the square root of 0.081/0.0064 x 0.484/6.25 x 2.5/12.1
(A) 0.45
(C) 0.95
(B) 0.75
(D) 0.99
Answer : A

Question. What is the least number which must be subtracted from 2509 to make it a perfect square ?
(A) 6
(B) 9
(C) 12
(D) 14 
Answer : B

Question. What is the square root of 42(583/1369)?
(A) 6(19/37)
(B) 4(2/11)
(C) 7(2/121)
(D) 6(12/37)
Answer : A

Question. If √1 + 27/169 = 1 + x/13 , what is the value of 'X ' ?
(A) 1
(B) 14
(C) 10
(D) 12
Answer : A

Please click the below link to access CBSE Class 8 Mathematics Worksheet - Square and Square Roots (1)