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# Find integers P and R. (1) P!=R! (2) R^3=|R

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SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

Find integers P and R. (1) P!=R! (2) R^3=|R [#permalink]  31 Aug 2003, 11:10
Find integers P and R.

(1) P!=R!
(2) R^3=|R|
Manager
Joined: 10 Jun 2003
Posts: 210
Location: Maryland
Followers: 2

Kudos [?]: 4 [0], given: 0

I will go E.

(I) can be any integers such that P = R
(II) R can be 0 or 1
_________________

Sept 3rd

Manager
Joined: 14 Aug 2003
Posts: 88
Location: barcelona
Followers: 1

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

(2) => R=0 OR R=1
now, if R=0, by (1), P can be 0 or 1; if R=1, P can be 0 or 1
so P=0 or 1 and R=0 or 1
Senior Manager
Joined: 22 May 2003
Posts: 334
Location: Uruguay
Followers: 1

Kudos [?]: 35 [0], given: 0

Doesn't change the answer, but don't forget -1

From (1): P=R=1,0 or -1
From (2): R=1 or 0

Combined: P=R=0 or 1

Still E
SVP
Joined: 03 Feb 2003
Posts: 1608
Followers: 6

Kudos [?]: 76 [0], given: 0

E is correct; though, your approaches, guys, are sometimes partly wrong.

(2) R= 0 or 1 not enough
(1) P=R>1 or [0, 1], or [1, 0], or [1, 1], or [0, 0] not enough

combine: [P, R] can be [0, 1], [1, 0], [1, 1], and [0, 0]
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