integral divisors

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sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 amFollowed by: 80 members; Location: India; Thanked: 267 times; GMAT Score:760

by sanju09 » Tue Feb 24, 2009 5:56 am

How many integral divisors does the number 120 have?

A. 14
B. 16
C. 12
D. 20
E. None of these

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Source: Beat The GMAT — Problem Solving | Tue Feb 24, 2009 5:56 am

bluementor: Master | Next Rank: 500 Posts; Posts: 418; Joined: Wed Jun 11, 2008 5:29 am; Thanked: 65 times

by bluementor » Tue Feb 24, 2009 5:59 am

120 = 2^3 x 3 x 5

No. of divisors = (3+1)*(1+1)*(1+1) = 4*2*2 = 16

Choose B.

-BM-

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