44. The number of scarfs of length half metre that can be made from y metres of cloth is
- (A) 2y
- (B) y/2
- (C) y + 2
- (D) y + (1/2)
43. 123x2y – 138x2y is a like term of
- (A) 10xy
- (B) –15xy
- (C) –15xy2
- (D) 10x2y
42. The expression for the number of diagonals that we can make from one vertex of a n sided polygon is
- (A) 2n + 1
- (B) n – 2
- (C) 5n + 2
- (D) n – 3
41. The length of a side of square is given as 2x + 3. Which expression represents the perimeter of the square?
- (A) 2x + 16
- (B) 6x + 9
- (C) 8x + 3
- (D) 8x + 12
40. In the formula, area of circle = πr2, the numerical constant of the expression πr2 is
- (A) 2
- (B) 0
- (C) 1
- (D) –1
39. In the expression 2πr, the algebraic variable is
- (A) 2
- (B) 2πr
- (C) π
- (D) r
38. 3a2b and –7ba2 are
- (A) unlike terms
- (B) like terms
- (C) mixed terms
- (D) none of these
37. –5a2b and –5b2a are
- (A) unlike terms
- (B) like terms
- (C) mixed terms
- (D) none of these
36. The speed of a car is 55 km/hrs. The distance covered in y hours is
- (A) 55y
- (B) 55/y
- (C) y/55
- (D) 55 + y
35. The expression x + y + z is an example of
- (A) Monomial
- (B) Binomial
- (C) Trinomial
- (D) None of these
34. If (x2y + y2 + 3) is subtracted from (3x2y + 2y2 + 5), then coefficient of y in the result is
- (A) 2x2
- (B) 2x
- (C) x2
- (D) x
33. – a – b – c is same as – a – (?)
- (A) –b – c
- (B) –b + c
- (C) b – c
- (D) b + c
32. What must be added to 3x + 23x2 + 6y2 + 2x + y2 to obtain 5x + 7y2?
- (A) –23x2
- (B) –x2
- (C) –23x
- (D) –x
31. Let Rohit has 5xy toffees and Shantanu has 20yx toffees. How many more toffees did Shantanu have?
- (A) 15xy
- (B) 15x
- (C) 15y
- (D) 4xy