DS INTEGER

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[email protected]: Senior | Next Rank: 100 Posts; Posts: 87; Joined: Sun Jul 24, 2011 10:36 am

by [email protected] » Sat Sep 17, 2011 12:34 pm

For all values of the integer x, is the product (x + 3)(x2 + 3x + 2) divisible by 4?

1) is an odd integer
2) x is divisible by 16

MY ANS D IS WRONG[spoiler][/spoiler]

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Source: Beat The GMAT — Data Sufficiency | Sat Sep 17, 2011 12:34 pm

cans: Legendary Member; Posts: 1309; Joined: Mon Apr 04, 2011 5:34 amFollowed by: 123 members; Location: India; Thanked: 310 times; GMAT Score:750

by cans » Sat Sep 17, 2011 9:01 pm

(x + 3)(x2 + 3x + 2) = (x+1)(x+2)(x+3)
A) x is odd. thus (x+1),(x+3) are consecutive even integers. thus divisible by 4
Sufficient
B) x=16n. Not divisible by 4. Sufficient
IMO D

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