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# DS: P is the positive integer, Is P a prime number? 1. P+3

Author Message
Manager
Joined: 08 Apr 2004
Posts: 131

Kudos [?]: 943 [0], given: 0

Location: Corea
DS: P is the positive integer, Is P a prime number? 1. P+3 [#permalink]

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07 Sep 2004, 07:34
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:54) correct 0% (00:00) wrong based on 1 sessions

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DS: P is the positive integer, Is P a prime number?
1. P+3 is a prime number
2. (P^2) +3 is a prime number

Kudos [?]: 943 [0], given: 0

Director
Joined: 20 Jul 2004
Posts: 590

Kudos [?]: 158 [0], given: 0

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07 Sep 2004, 07:44
E?

1. P+3 is a prime number
If P = 2, P+3 = 5 (Prime) Ans: P is prime
If P = 4, P+3 = 7 (Prime) Ans: P is not prime

2. P^2+3 is a prime number
If P = 2, P^2+3 = 7 (Prime) Ans: P is prime
If P = 4, P^2+3 = 19 (Prime) Ans: P is not prime

Together
If P = 2, P+3 = 5 (Prime), P^2+3 = 7 (Prime) Ans: P is prime
If P = 4, P+3 = 7 (Prime), P^2+3 = 19 (Prime) Ans: P is not prime

Kudos [?]: 158 [0], given: 0

Manager
Joined: 02 Apr 2004
Posts: 222

Kudos [?]: 23 [0], given: 0

Location: Utrecht

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07 Sep 2004, 12:26
Yep, I have E as answer too.

Same method I used like hardworker.
This question costed me less than 2 minutes, and to be honest I like question like these to see on the real test.

Regards,

Alex

Kudos [?]: 23 [0], given: 0

07 Sep 2004, 12:26
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