57. Which one of the following is a prime number ?
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58. Which one of the following is a prime number ?
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59. The smallest 3-digit prime numbers is :
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60. If a and b are odd numbers, then which of the following is even ?
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61. Which one of the following cannot be the square of a natural number ?
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62. Which one of the following cannot be the square of a natural number ?
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63. What smallest number should be added to 4456 so that the sum is completely divisible by 6 ?
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