ALGEBRAIC EXPRESSIONS, IDENTITIES AND FACTORISATION
(MCQs)
CBSE Class 8 - Maths
Q1: Which is the like term as 24a²bc?
(a) 13 × 8a × 2b × c × a
(b) 8 × 3 × a × b × c
(c) 3 × 8 × a × b × c × c
(d) 3 × 8 × a × b × b × c
Q2: a ( b + c) = ab + ac is
(a)commutative property
(b) distributive property
(c) associative property
(d) closure property
Q3: (x + 5)(x - 5) = ?
(a) 2x
(b) x² - 10
(c) (x - 5)²
(d) x² - 25
Q4: The product of a monomial and a binomial is a
(a) monomial
(b) binomial
(c) trinomial
(d) none of these
Q5: The sum of –7pq and 2pq is
(a) –9pq
(b) 9pq
(c) –5pq
(d) 5pq
Q6: 8a²b³ ÷ (-2ab) = ?
(a) 4ab²
(b) -4ab²
(c) 4a²b
(d) -4a²b
Q7: If we subtract –3x²y² from x²y², then we get
(a) – 4x²y²
(b) – 2x²y²
(c) 2x²y²
(d) 4x²y²
Q8: (x + 3)(x + 3) = ?
(a) x² + 9
(b) x² + 9x
(c) x² + 6x + 9
(d) x² + 9x + 9
Q9: Factors of 2x - 32x³ is
(a) 2(x - 4)(x + 4)
(b) 2x(1 + 2x)²
(c) 2x²(1 - 16x)
(d) 2x(1 -4x)(1 + 4x)
Q10: Factorised form of p² – 17p – 38 is
(a) (p – 19) (p + 2)
(b) (p – 19) (p – 2)
(c) (p + 19) (p + 2)
(d) (p + 19) (p – 2)
Answers:
1: (a) 13 × 8a × 2b × c × a
2: (b) distributive property
3: (d) x² - 25
4: (b) binomial
5: (c) –5pq
6: (b) -4ab²
7: (d) 4x²y²
8: (c) x² + 6x + 9
9: (d) 2x(1 -4x)(1 + 4x)
10: (a) (p – 19) (p + 2)
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