115.Check whether 12n can end with digit 5 for any n ∊ N.
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116. Explain why 11 × 13 × 17 + 17 is a composite number.
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117.If be a rational number such that the prime factorization of q is not of the form 2n5m, where n, m are non-negative integers, then x has decimal expansion which is non-terminating repeating. Is this statement true ?
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118.Prove that for any prime positive integerp, is an irrational number.
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119.Find the smallest number which when increased by 17 is exactly divisible by both 520 and 468.
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120.In a school there are two sections—section A and section B of class X. There are 17 students in section A and 25 in section B. Find the minimum number of books required for their class library so that they can be distributed equally among students of section A or section B.
Short Answer Type
be a rational number such that the prime factorization of q is not of the form 2n5m, where n, m are non-negative integers, then x has decimal expansion which is non-terminating repeating. Is this statement true ?
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