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Which of the following is a prime number?(a) 31(b) 52(c) 21(d) 32The question was asked in exam.This interesting question is from Real Numbers topic in division Real Numbers of Mathematics – Class 10

Answer»

The correct ANSWER is (a) 31

Best explanation: A prime number has two FACTORS the number itself and 1. In case of 31 there are two factors i.e. 31 and 1. HENCE, it is a prime number.



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