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# A credit card number has 6 digits (between 1 to 9). The firs

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Intern
Joined: 14 Feb 2015
Posts: 20
Re: A credit card number has 6 digits (between 1 to 9). The firs  [#permalink]

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03 Feb 2018, 23:23
Thanks a lot pushpitkc. I got it. So if they don't mention that the numbers cannot be repeated, it simply means that it can be repeated
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Location: France
GMAT 1: 600 Q48 V25
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Re: A credit card number has 6 digits (between 1 to 9). The firs  [#permalink]

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02 Dec 2018, 04:23
Bunuel wrote:
{1}{2}{greater than 6}{divisible by 3}{3x}{x}:

The fourth digit can take 3 values: 3, 6, or 9.

Hope it helps.

Can the fourth digit (which is supposed to be divisible by 3) not take Zero as a value??
I considered this as a possbility and got 36 instead of 27 as the answer.
Re: A credit card number has 6 digits (between 1 to 9). The firs   [#permalink] 02 Dec 2018, 04:23

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