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If n > 5, the units digit of the product of n consecutive

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Senior Manager
Joined: 19 Feb 2004
Posts: 415
Location: Lungi
Followers: 1

Kudos [?]: 5 [0], given: 0

If n > 5, the units digit of the product of n consecutive [#permalink]  19 Feb 2004, 07:28
If n > 5, the units digit of the product of n consecutive numbers is -
a. odd
b. not divisible by 5
c. 2
d. 0
e. divisible by 7
SVP
Joined: 30 Oct 2003
Posts: 1797
Location: NewJersey USA
Followers: 5

Kudos [?]: 41 [0], given: 0

I would like to think 0

This is basically n!
for any n>5 n! has always 0 in the units digit.
4! = 24 which does not have a zero
Manager
Joined: 26 Dec 2003
Posts: 227
Location: India
Followers: 1

Kudos [?]: 2 [0], given: 0

Has to be 0. Becoz there will be a number with 5 and and even number. and their product will be with the units digit has 0.
Director
Joined: 03 Jul 2003
Posts: 656
Followers: 2

Kudos [?]: 22 [0], given: 0

Another good one.
Manager
Joined: 16 Jan 2004
Posts: 65
Location: NJ
Followers: 1

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

Agree. It should be 0
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