need short method

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ayushiiitm: Master | Next Rank: 500 Posts; Posts: 216; Joined: Wed Jul 23, 2008 2:35 am; Location: Pune, India; Thanked: 5 times; GMAT Score:700

by ayushiiitm » Thu Jul 15, 2010 11:41 am

A cubic polynomial p (x) satisfies the criteria that p (1) = 1, p (2) = 2, p (3) = 3 and p (4) = 5. Then the value of p (6) is
(A) 6
(B) 10
(C) 15
(D) 16
(E) 60

How to solve without going for long method of simultaneous equations

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Source: Beat The GMAT — Problem Solving | Thu Jul 15, 2010 11:41 am

GMATGuruNY: GMAT Instructor; Posts: 15539; Joined: Tue May 25, 2010 12:04 pmFollowed by: 1906 members; Location: New York, NY; Thanked: 13060 times; GMAT Score:790

by GMATGuruNY » Thu Jul 15, 2010 11:56 am

ayushiiitm wrote:A cubic polynomial p (x) satisfies the criteria that p (1) = 1, p (2) = 2, p (3) = 3 and p (4) = 5. Then the value of p (6) is
(A) 6
(B) 10
(C) 15
(D) 16
(E) 60

How to solve without going for long method of simultaneous equations

This question would never appear on the GMAT, so I wouldn't worry about it. The GMAT doesn't test cubic polynomials.

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Stuart@KaplanGMAT: GMAT Instructor; Posts: 3225; Joined: Tue Jan 08, 2008 2:40 pmFollowed by: 614 members; Location: Toronto; Thanked: 1710 times; GMAT Score:800

by Stuart@KaplanGMAT » Thu Jul 15, 2010 12:46 pm

ayushiiitm wrote:A cubic polynomial p (x) satisfies the criteria that p (1) = 1, p (2) = 2, p (3) = 3 and p (4) = 5. Then the value of p (6) is
(A) 6
(B) 10
(C) 15
(D) 16
(E) 60

How to solve without going for long method of simultaneous equations

Hi,

Sanju makes a lot of posts (I'm assuming you cross-posted this from the thread that he started) involving non-GMAT questions - I'd steer clear of them.

As already noted, there's no way this question would show up on the GMAT.

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