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ketkoag: Legendary Member; Posts: 876; Joined: Thu Apr 10, 2008 8:14 am; Thanked: 13 times

by ketkoag » Wed Jun 10, 2009 2:04 am

a1=2, a2=3, a3=a1*a2, a4=a1*a2*a3*, ... If an=t (n>=3), a(n+2)=?

[spoiler]IMO : t/36.. but OA is diff. [/spoiler]please lemme know if i am missing something..

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Source: Beat The GMAT — Problem Solving | Wed Jun 10, 2009 2:04 am

sacx: Master | Next Rank: 500 Posts; Posts: 139; Joined: Wed Oct 22, 2008 4:36 am; Thanked: 17 times

by sacx » Wed Jun 10, 2009 2:29 am

a1 = 2
a2 = 3
a3 = 6 (= t)
a4 = 36
a5 = 2*3*6*36

a5 = 216* t

so answer should be a(n+2) = 216*t

SACX

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ketkoag: Legendary Member; Posts: 876; Joined: Thu Apr 10, 2008 8:14 am; Thanked: 13 times

by ketkoag » Mon Jun 22, 2009 4:36 am

thanks..

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