Squares and Square Roots

67. The positive square root of a number x is denoted by

  • (A) ±√x
  • (B) √x
  • (C) –√x
  • (D) None of these

66. What is the value of √36?

  • (A) ±6
  • (B) 6
  • (C) –6
  • (D) None of these

65. Which of the following digit a perfect square can never have at the unit’s place? 

  • (A) 1
  • (B) 6
  • (C) 5
  • (D) 3

64. How many perfect square numbers are there between 1 and 50?

  • (A) 7
  • (B) 6
  • (C) 8
  • (D) 10

63. Which of the following is not a perfect square?

  • (A) 361
  • (B) 1156
  • (C) 1128
  • (D) 1681

62. How many times each prime factor appears in its square?

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4

61. Which of the following number is obviously not be a perfect square?

  • (A) 484
  • (B) 441
  • (C) 402
  • (D) 400

60. Which of the following number is obviously not be a perfect square?

  • (A) 217
  • (B) 225
  • (C) 256
  • (D) 289

59. Which of the following number is obviously not be a perfect square?

  • (A) 529
  • (B) 523
  • (C) 484
  • (D) 441

58. Which of the following number is obviously not be a perfect square?

  • (A) 628
  • (B) 625
  • (C) 576
  • (D) 729

57. Which of the following numbers may be a perfect square?

  • (A) 443
  • (B) 442
  • (C) 441
  • (D) 447

56. Which of the following numbers may be a perfect square?

  • (A) 787
  • (B) 788
  • (C) 784
  • (D) 782

55. Which of the following numbers may be a perfect square?

  • (A) 253
  • (B) 258
  • (C) 256
  • (D) 257

54. A perfect square can never have the following digit in its ones place.

  • (A) 1
  • (B) 8
  • (C) 0
  • (D) 6

53. 196 is the square of

  • (A) 11
  • (B) 12
  • (C) 14
  • (D) 16

52. Square root of 1.96 is

  • (A) 0.14
  • (B) 1.4
  • (C) 1.04
  • (D) 1.004

51. If 1 m2 = z cm2, the value of z will be

  • (A) 100
  • (B) 1000
  • (C) 10000
  • (D) 10

50. Which of the following numbers may be a perfect square?

  • (A) 628
  • (B) 625
  • (C) 622
  • (D) 627

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