CBSE Class 8 Mental Maths Squares and Square Roots Worksheet
CBSE Class 8 Mental Maths Squares and Square Roots Worksheet with Solution by Expert Mathematician. Students of 8th Grade can solve this worksheet for extra preparation before exam.Private Teacher or Guardians of the Students can copy all the questions of this chapter and will match after solve their students.
Squares and Square Roots Class 8 Worksheet
1.) Simplify: √10×10+7×3
2.) Simplify: √64+√289
3.) Find the sum of first 11 natural numbers
4.) Find the sum of first 14 even numbers
5.) Simplify: (√225)^2+ √81
6.) Find the value of (4+5+6+7+8+9)^2
7.) Simplify: √729 -√441
8.) Find the falue of x, if x^2 + 19 =10^2
9.) Evaluate (5+√3) + (5-√3)
10). Find the value of (45)^2 – (35)^2
11). √96 × √48
12). If the area of a square is 441. Then find its perimeter.
13). (100+20)(100-20)
14). √0.289/0.00121
15.) Simplify: 112/√196 × √576/12 × √256/8
16.) What is the square root of 0.0009
17.) If √1+ x/144 = 13/12 find the value of x
18.) Find the least square number which is exactly divisible by 10,12,15 and 18
- )Find the value of x, √11881× √x =10137
20.) If y=5, then 10y√y^3-y^2 =?
21). 15^2 + 18^2 -20 = √x. Find value of x
22.) √50×√98 =?
23). 0.13 ÷ p^² =13. Find the value of p
24.) √3^n = 729. Find n
25.) Find the sum of first 12 natural numbers
Answers:
1.) √100+21
=√121
=11
2.) 8+17= 25
3.) 11(11+1)/2=66
4.) 14×(14+1)= 210
5.) 225+9= 234
6.) (39)^2= 1521
7.) 27-21= 6
8.) x^2= 100-19
x=√81
x=9
9.) 5^2- (√3)^2
=25-3
=22
10). 2025-1225 = 800
11). 4√6× 4√3
= 16√18
= 48√2
12). Area=441
Then side=√441
Side=21
So, perimeter=21×4= 84
13.) (100)^2 – (20)^2
= 10000-400
=9600
14) √0.28900/0.00121
= √28900/121
= 170/11
15.) 112/14 × 24/12 × 16/8
= 32
16). √9/√10000
= 3/100
=0.03
17). 1+ x/144 = 169/144
x/144 = 169/144 -1
x/144= 25/144
x= 25
18.) LCM of 10,12,15,18= 180
180= 2×2×3×3×5
To make it a perfect square it should be multiplied by 5
So required number 180×5=900
19) 109 √x = 10137
√x= 93
X= 8649
20) 10×5 √125-25
50×10
500
21.) √x= 225+324-20
√x=529
X= 279841
22). √50×98
= √4900
= 70
23.) 0.13/p^2 = 13
P^2 = 0.13/13
p^2 = 1/100
p= 1/10 = 0.1
24.) 3^12 = 3^n
N=12
25.) (12)^2 =144