# 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