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If n is a factor of 129. How many values of n are possible
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25 Aug 2018, 12:03
25 Aug 2018, 12:03
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Question Stats:
69% (01:12) correct
30% (00:34) wrong based on 13 sessions
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If n is a factor of 129. How many distinct positive integer values of n are possible?
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
Re: If n is a factor of 129. How many values of n are possible
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31 Aug 2018, 03:33
31 Aug 2018, 03:33
1
Answer has to 4 do not forget to include 1 and 129 with 43 and 3.
Re: If n is a factor of 129. How many values of n are possible
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31 Aug 2018, 05:49
31 Aug 2018, 05:49
this number is small so you can count but some are not easy to count. Systematic approach: this question is the same as asking how many distinct factors of 129. First do prime factorization: 129 = 3x43. 3 has power of 1, and 43 has power of 1 => # of distinct factors = (1+1)x(1+1)=4
