15. Which of the following are prime numbers?(1) 103(ii) 137(iii) 161(v) 217(vi) 277(vii) 331(iv) 179(viii) 397 About the author Piper
prime numbers are the nos which have only 2 factors , 1 and the no itself. (I) Prime number (ii) Prime number (iii) it has 1,7 and 161 as factors. So it is not a prime. (v) Similarly even this is not a prime no. (vi) Prime no (vii) Prime no (iv) Prime no (viii) prime Reply
prime numbers are the nos which have only 2 factors , 1 and the no itself.
(I) Prime number
(ii) Prime number
(iii) it has 1,7 and 161 as factors. So it is not a prime.
(v) Similarly even this is not a prime no.
(vi) Prime no
(vii) Prime no
(iv) Prime no
(viii) prime
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