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A is a member of a set of numbers {2, 3, 24, 50 and 178}.
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05 May 2018, 07:22
05 May 2018, 07:22
Expert Reply
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Question Stats:
52% (01:16) correct
47% (01:44) wrong based on 23 sessions
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A is a member of a set of numbers {2, 3, 24, 50 and 178}. If \(N= 6^A\) , what is the probability that 876,463 is not a multiple of \(N\) ?
A. 0%
B. 6%
C. 40%
D. 78%
E. 100%
A. 0%
B. 6%
C. 40%
D. 78%
E. 100%
Re: A is a member of a set of numbers {2, 3, 24, 50 and 178}.
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05 May 2018, 07:39
05 May 2018, 07:39
1
this is how I solved it:
876,463 is only divisible by 7; it can't be divided by 6.
since N is a multiple of 6, so 876,463 has to be divisible by 6. BUT we already know that it can't be. So there's no way 876,463 can be a multiple of N.
so the answer would be 100% (876,463 must not a multiple of N)
unfortunately I miss the word "not" in the question prompt
so I clicked the wrong option (I clicked the choice 0% instead)
876,463 is only divisible by 7; it can't be divided by 6.
since N is a multiple of 6, so 876,463 has to be divisible by 6. BUT we already know that it can't be. So there's no way 876,463 can be a multiple of N.
so the answer would be 100% (876,463 must not a multiple of N)
unfortunately I miss the word "not" in the question prompt
so I clicked the wrong option (I clicked the choice 0% instead)
Re: A is a member of a set of numbers {2, 3, 24, 50 and 178}.
[#permalink]
05 May 2018, 10:55
05 May 2018, 10:55
1
Okay, I will admit that this question looks too hard to be simple. Which means, I did think that 876,463 should be divisble by 6 for it to be a multiple of N. But the I thought they wouldne give all this information for just one step and I was stumped. Took me 4 mins to find a way and I still got the wrong answer
