Odds & Evens

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Abdulla: Master | Next Rank: 500 Posts; Posts: 328; Joined: Thu Aug 07, 2008 5:25 pm; Location: Philadelphia; Thanked: 4 times; GMAT Score:550

by Abdulla » Tue Sep 22, 2009 4:09 pm

If w, x, y and z are integers and w + x = y, is y divisible by z?
(1) w and x each have a remainder of 1 when divided by z.
(2) z = 2

OA is C

Abdulla

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Source: Beat The GMAT — Data Sufficiency | Tue Sep 22, 2009 4:09 pm

crackthetest: Senior | Next Rank: 100 Posts; Posts: 40; Joined: Mon Feb 16, 2009 8:50 pm; Thanked: 3 times

ans

by crackthetest » Tue Sep 22, 2009 6:31 pm

Ans: C
here is why:
(1) w and x each have a remainder of 1 when divided by z.
w = m(z) + 1
x = n(z) + 1
y = z(m+n) + 2
not sufficient.

(2) z = 2
not sufficient.

(1) & (2) makes y is a multiple of 2, hence y/z => remainder 0.
answer C

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Abdulla: Master | Next Rank: 500 Posts; Posts: 328; Joined: Thu Aug 07, 2008 5:25 pm; Location: Philadelphia; Thanked: 4 times; GMAT Score:550

by Abdulla » Tue Sep 22, 2009 7:01 pm

Thanks

Abdulla

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