Is a 3 digit number divisible by 6? 1) The sum of tens and : DS Archive
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# Is a 3 digit number divisible by 6? 1) The sum of tens and

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Is a 3 digit number divisible by 6? 1) The sum of tens and [#permalink]

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27 Apr 2006, 22:39
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Is a 3 digit number divisible by 6?

1) The sum of tens and hundreds' digit is 6.

2) Unit digit is 6.
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Re: DS 3 digit number [#permalink]

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27 Apr 2006, 23:18
getzgetzu wrote:
Is a 3 digit number divisible by 6?

1) The sum of tens and hundreds' digit is 6.

2) Unit digit is 6.

to be divisible by 6 must be divisible by 3 and to be even

from (1)

insuff. not info about unit so no idea if is even or if the addition of the 3 digits is a multiple of 3

from (2) not enough either, the 3 digit numbre might not be divisible by 3

together

yes is sufficient

so I'll go with C
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27 Apr 2006, 23:29
Agree it's C

1. Insufficient, tens and hundreds place can be anything, 5,1; 1,5; 3,3; 4,2...

2. Insufficient.

Combining 1 and 2, the sum of ones, tens and hundreds will always be a number which is divisible by 2 and 3 ==> thus by 6.
27 Apr 2006, 23:29
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