Factorisation
43. The representation of an expression as the product of its factors is called
- (A) Commutativity
- (B) Distributivity
- (C) Factorisation
- (D) Expansion
42. The irreducible factorisation of 3a3 + 6a is
- (A) 3a(a2 + 2)
- (B) 3(a3 + 2)
- (C) a(3a2 + 6)
- (D) 3 × a × a × a + 2 × 3 × a
41. Common factor of x2y and –xy2 is xy.
- (A) xy
- (B) x only
- (C) y only
- (D) None of these
40. Common factor of ax2 + bx is
- (A) ax2
- (B) x2
- (C) x
- (D) bx
39. What is the value of (3x + 3x2) ÷ 3x?
- (A) 3x
- (B) 3x2
- (C) x + 1
- (D) x2 + 1
38. Which of the following is the correct value of 6x3 ÷ 3x2?
- (A) 2x2
- (B) 2x
- (C) 3x
- (D) 2x5
37. The common factor of 3ab and 2cd is
- (A) 1
- (B) – 1
- (C) a
- (D) c
36. An irreducible factor of 24x2y2 is
- (A) x2
- (B) y2
- (C) x
- (D) 24x
35. Number of factors of (a + b)2 is
- (A) 4
- (B) 3
- (C) 2
- (D) 1
34. The factorised form of 3x – 24 is
- (A) 3x × 24
- (B) 3(x – 8)
- (C) 24(x – 3)
- (D) 3(x – 12)
33. The factorisation of 2x + 4y is
- (A) 2(x + y)
- (B) 2(x + 2y)
- (C) x(2 + y)
- (D) x(x + 2y)
32. Common factor of 17abc, 34ab2, 51a2b is
- (A) 17abc
- (B) 17ab
- (C) 17ac
- (D) 17a2b2c
31. Factorised form of r2 – 10r + 21 is
- (A) (r – 1) (r – 4)
- (B) (r – 7) (r – 3)
- (C) (r – 7) (r + 3)
- (D) (r + 7) (r + 3)
30. 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)
29. On dividing 57p2qr by 114pq, we get
- (A) ¼pr
- (B) ¾pr
- (C) ½pr
- (D) 2pr