Squares and Square Roots MCQ Questions Class 8 Maths Chapter 6
NCERT MCQ Questions for Class 8 Maths Chapter 6 Squares and Square Roots. Squares and Square Roots MCQ Questions with Answers from Class 8 Mathematics.
Squares and Square Roots MCQ Questions Class 8 Maths Chapter 6
Squares and Square Roots Multiple Choice Questions with Answers Class 8 Maths Chapter 6 PDF is available.
Question 1:
Find square root of 144
(a) 14
(b) 12
(c) 11
(d) 16
Ans:
144 = 12×12
= 144
= √144
= 12 (b)
Question 2:
Which no is the perfect square?
(a) 201
(b) 196
(c) 199
(d) 281
Ans:
(b) 196, 14×14 = 196
196 is the perfect square.
Question 3:
Which of the following digit have 4 at the unit place?
(a) 182
(b) 92
(c) 32
(d) 152
Ans:
(a) 182 = 324
(b) 92 = 81
(c) 32 = 9
(d) 152 = 225
(a) 182 = 324 has 4 at unit place.
Question 4:
Observe the following pattern and find the missing digit
12 = 1
(11)2 = 121
(101)2 =?
(a) 10301
(b) 12101
(c) 10201
(d) 12121
Ans:
(c) 10201
101×101 = 10201 by this tricks
101
+ 101
_________
10201
Question 5:
Find the missing numbers (x =?)
42 + 52 + x2 = 212
(a) 22
(b) 21
(c) 20
(d) 15
Ans:
42 + 52 + x2 = 212
16 + 25 + x2 = 441
x2 = 441 – 41
x2 = 400,
x = 20 (c)
Question 6:
Find the square of the 37 without actual multiplication.
(a) 1369
(b) 1444
(c) 1521
(d) 1269
Ans:
(37)2
= (30 + 7)2
= 30 (30 + 7) + 7 (30 + 7)
= 302 + 2 × 30 × 7 + 72
= 900 + 420 + 49
(37)2 = 1369 (a)
Question 7:
Write a Pythagorean triple whose smallest number is 6.
(a) 2, 4, 8
(b) 2, 4, 6
(c) 8, 9, 10
(d) 6, 8, 10
Ans:
We can get Pythagorean triplet by
Using general formula 2m, m2 – 1, m2 + 1, m2 – 1 = 6, m2 = 6 + 1 = 7
And m2 + 1 = 6, m2 = 5 will not given integer value for m. So let us take,
2m = 6, m = 3, m2 – 1 = 9 – 1 = 8
m2 + 1 = 9 + 1 = 10, the required triplet is 6, 8, 10 (d)
- In case you have missed:- Previous Chapter MCQ Questions
Question 8:
Is, 92 a perfect square?
(a) Yes
(b) No
(c) May be
(d) May not be
Ans:
We have 92 = 2 × 2 × 23
As the prime factor 23, 92 is not perfect square (b) Not.
Question 9:
Find the square root of 729.
(a) 27
(b) 29
(c) 28
(d) 25
Ans:
729 = 3 × 3 × 3 × 3 × 3
= 36 = 32 × 32 × 32
(a) = (27)2
Question 10:
Find which are not the perfect square?
(a) 196
(b) 225
(c) 441
(d) 456
Ans:
(d) 456 = 2 × 228 = 2 × 2 × 114
= 2 × 2 × 2 × 57
= 2 × 2 × 2 × 19 × 3
19, 3, 2 is prime no. so that it is not a perfect square.
Question 11:
625 plants are to be planted in a garden in such a way that each row contains as many plants as the number of rows. Find the no. of rows and the number of plants in each row
(a) 23
(b) 24
(c) 25
(d) 15
Ans:
625 = 25 × 25
No. of plants in each row = 25 and no. of rows = 25 (d)
Question 12:
Find the smallest square number which is divisible by each of the numbers 2, 3, and 5
(a) 45
(b) 30
(c) 35
(d) 25
Ans:
2 × 3 × 5 = 30 (b) is the number which is divisible by 2, 3 and 5
Question 13:
Find the square root of 6.25
(a) 25
(b) 3.5
(c) 2.5
(d) 4.5
Ans:
Question 14:
Area of a square plot 2401 m2. Find the side of square plot.
(a) 49
(b) 48
(c) 59
(d) 39
Ans:
Area of square plot = 2401 m2
Side of the square plot = √2401 m
= 49
The side of the square plot 49 (a)
Question 15:
Find the square root of the 1396
(a) 39
(b) 37
(c) 27
(d) 29
Ans:
- In case you have missed:- Next Chapter MCQ Questions