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# rightmost non-zero digit

Author Message
Director
Joined: 25 Oct 2008
Posts: 607
Location: Kolkata,India
Followers: 11

Kudos [?]: 594 [0], given: 100

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24 Aug 2009, 15:02
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 100% (01:23) wrong based on 4 sessions

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What is the rightmost non-zero digit of 20!?
a) 2
b) 3
c) 5
d) 6
e) 8
_________________
Manager
Joined: 10 Aug 2009
Posts: 130
Followers: 3

Kudos [?]: 62 [0], given: 10

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24 Aug 2009, 18:04
I am getting 6.
I got 8 initially but now I am getting 6...
I am wondering if 6 or 8 is right or neither...lol
Manager
Joined: 28 Jul 2009
Posts: 124
Location: India
Schools: NUS, NTU, SMU, AGSM, Melbourne School of Business
Followers: 6

Kudos [?]: 66 [0], given: 12

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24 Aug 2009, 22:53
tejal777 wrote:
What is the rightmost non-zero digit of 20!?
a) 2
b) 3
c) 5
d) 6
e) 8

ps-rightmost-nonzero-digit-product-of-factors-82401.html?view-post=617960#p617960
_________________

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Re: rightmost non-zero digit   [#permalink] 24 Aug 2009, 22:53
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