Practice Questions Mathematics, Class -8

Q.No.	Questions
1.	Solve the following equations: (i) 2y - 3 = 1/2 (ii) 5y/6 + 3/4 = -y + 8 (iii) (3x-5)/4 + (2-x)/6 - 1/3 = x/2 (iv) 7(m - 9) - (8- 3m ) + 5 = 3 - (m +5)
2.	Write the additive inverse of (A) -5/7 (B) 2/9
3.	Write the multiplicative inverse of (a) -1 (b) 6/7 (c) -2/5
4.	Simplify : 2/3 + 5/6 - 7/2
5.	Express 100 as the sum of odd numbers.
6.	Fill in the blanks: (i) 52 + (...)2 + (...)2 = 312 (ii) (...)2 + 82 + 562 = (...)2 (iii) 62 + 72 + (...)2 = (...)2
7.	Find the sum of the squares of the first 21 odd numbers.
8.	What will be the square of 111111 ?
9.	(10001)2= .....
10.	(1010101)2 = .....
11.	Find the square root of 32400.
12.	Find the cube root of 42875.
13.	Evaluate the following:- (i)(-5)2+ (-3)3-(7)2 (ii)(-3)3- (-31)2-(5)2 (iii)(10)2+ (8)2-(-9)2
14.	Evaluate the following: (i)√(100)+ ∛(343) - ∜(16) (ii)√(12321)- ∛(721) + ∜(625)
15.	Solve the following equations: (i)(2)ᵐ = 64 (ii)(y-4)/5 - 3/10 = y/2 (iii)6(m+5) - (7 - 2m) + 2 = 3(m-4)
16.	Answer the following: (i) What is the additive inverse of -22/3 ? (ii)What is the additive identity of rational numbers? (iii)What is the multiplicative inverse of 7/11 ?