Multiple Choice Questions
51. In algebra, letters may stand for
- (A) known quantities
- (B) unknown quantities
- (C) fixed numbers
- (D) none of these
50. Variable means that it
- (A) can take different values
- (B) has a fixed value
- (C) can take only 2 values
- (D) can take only three values
49. In algebra, a × b means ab, but in arithmetic 3 × 5 is
- (A) 35
- (B) 53
- (C) 15
- (D) 8
48. 4a equals
- (A) 4 + a
- (B) 4 × a
- (C) a × a × a × a
- (D) 4 ÷ a
47. Which of the following is an equation?
- (A) x + 1
- (B) x – 1
- (C) x – 1 = 0
- (D) x + 1 > 0
46. Which of the following is an equation?
- (A) x + 7
- (B) 2y + 3 = 7
- (C) 2p < 10
- (D) 12x
45. The variable used in the equation 2p + 8 = 18 is
- (A) 2
- (B) 8
- (C) p
- (D) 18
44. 8 more than three times the number x can be represented as
- (A) 8 + x + 3
- (B) 3x – 8
- (C) 3x + 8
- (D) 8x + 3
43. 7 times of y subtracted from 50 can be expressed as
- (A) 7y – 50
- (B) 50 – 7y
- (C) 5 × 7 – y
- (D) 50 × 7 – y
42. 13 subtracted from thrice of a number can be expressed as
- (A) 3y – 13
- (B) 13 – 3y
- (C) 13y – 3
- (D) 13y + 3
41. Megha’s age (in years) is 2 more than 5 times her daughter’s age can be expressed as
- (A) 2m – 5
- (B) 2 – 5m
- (C) 5m – 2
- (D) 5m + 2
40. Cost of a pencil is ₹x. Cost of a pen is six times that of a pencil. What is the cost of a pen?
- (A) x/6
- (B) 6x
- (C) x + 6
- (D) x – 2