39. If each match box contains 50 matchsticks, the number of matchsticks required to fill n such boxes is
- (A) 50 + n
- (B) 50n
- (C) 50 ÷ n
- (D) 50 – n
38. Amulya is x years of age now. 5 years ago her age was
- (A) (5 – x) years
- (B) (5 + x) years
- (C) (x – 5) years
- (D) (5 ÷ x) years
37. Which of the following represents 6 × x?
- (A) 6x
- (B) 6/x
- (C) 6 + x
- (D) 6 – x
36. Solution of the equation 3 – x = 8 is
- (A) x = 11
- (B) x = 5
- (C) x = –5
- (D) x = –11
35. If x takes the value 2, then the value of x + 10 is
- (A) 20
- (B) 12
- (C) 5
- (D) 8
34. If the perimeter of a regular hexagon is x meters, then the length of each of its sides is
- (A) (x + 6) meters
- (B) (x ÷ 6) meters
- (C) (x – 6) meters
- (D) (6 ÷ x) meters
33. Which of the following equations has x = 2 as a solution?
- (A) x + 2 = 5
- (B) x – 2 = 0
- (C) 2x + 1 = 0
- (D) x + 3 = 6
32. For any two integers x and y, which of the following suggests that operation of addition is commutative?
- (A) x + y = y + x
- (B) x + y > x
- (C) x – y = y – x
- (D) x × y = y × x
31.
21. Which of the following equations does not have a solution in integers?
- (A) x + 1 = 1
- (B) x – 1 = 3
- (C) 2x + 1 = 6
- (D) 1 – x = 5
30. 10 – x means
- (A) 10 is subtracted x times
- (B) x is subtracted 10 times
- (C) x is subtracted from 10
- (D) 10 is subtracted from x
29. The area of a square having each side x is
- (A) x × x
- (B) 4x
- (C) x + x
- (D) 4 + x
28. The expression obtained when x is multiplied by 2 and then subtracted from 3 is
- (A) 2x – 3
- (B) 2x + 3
- (C) 3 – 2x
- (D) 3x – 2
27. 4/2 = 2 denotes a
- (A) numerical equation
- (B) algebraic expression
- (C) equation with a variable
- (D) false statement