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Atult718: Senior | Next Rank: 100 Posts; Posts: 38; Joined: Wed Mar 14, 2007 1:17 am

by Atult718 » Mon Jul 30, 2007 5:29 am

Hey,

How would you solve this ?

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Source: Beat The GMAT — Problem Solving | Mon Jul 30, 2007 5:29 am

givemeanid: Master | Next Rank: 500 Posts; Posts: 277; Joined: Sun Jun 17, 2007 2:51 pm; Location: New York, NY; Thanked: 6 times; Followed by:1 members

by givemeanid » Mon Jul 30, 2007 5:57 am

450y = n*n*n
2*3*3*5*5*y = n*n*n

y needs another 2*2*3*5 for it to be a cube of another number.

So, y/(2*2*3*5) should be an integer.

So It Goes

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