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Updated on: 21 Aug 2007, 08:23
Originally posted by gmatiscoming on 20 Aug 2007, 16:11.
Last edited by gmatiscoming on 21 Aug 2007, 08:23, edited 1 time in total.
Last edited by gmatiscoming on 21 Aug 2007, 08:23, edited 1 time in total.
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In the sequence A, A1 = 43, A2 = 47,...., Ak = k^2 + k + 41. Is every term in sequence A a prime number?
(1) There are fewer than 100 terms in sequence A.
(2) There are more than 50 terms in sequence A.
I dont have an OA for this one. I tested out a bunch of numbers with a prime calculator. let me know what you guys think
(1) There are fewer than 100 terms in sequence A.
(2) There are more than 50 terms in sequence A.
I dont have an OA for this one. I tested out a bunch of numbers with a prime calculator. let me know what you guys think
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20 Aug 2007, 17:58
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I would double check the posting..
Given the equation, there is no way for every number in the set to be prime
AK = 2K + K + 41
Even + odd + even , if K is odd = Even ( other than 2 no other number is even and prime)
If K is even
Even + Even + odd = odd .. Could be ..
Is that the correct equation..
If so, answer E .
Given the equation, there is no way for every number in the set to be prime
AK = 2K + K + 41
Even + odd + even , if K is odd = Even ( other than 2 no other number is even and prime)
If K is even
Even + Even + odd = odd .. Could be ..
Is that the correct equation..
If so, answer E .
21 Aug 2007, 08:22
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bkk145
no, but i made a mistake in formatting.
it is Ak= k^2+k+41
now its a whole different problem!
