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