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How many three-digit integers are not divisible by 3 ?

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How many three-digit integers are not divisible by 3 ? [#permalink] New post 12 Jun 2010, 11:02
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A
B
C
D
E

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Question Stats:

63% (02:02) correct 37% (01:17) wrong based on 156 sessions
How many three-digit integers are not divisible by 3 ?

A. 599
B. 600
C. 601
D. 602
E. 603
[Reveal] Spoiler: OA
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Re: GMAT Club - [t]m16#11[/t] [#permalink] New post 12 Jun 2010, 11:54
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gmatcracker2010 wrote:
How many three-digit integers are not divisible by 3 ?



* 599
* 600
* 601
* 602
* 603

OA is
[Reveal] Spoiler:
b


CAn somebody please explain>?


Total 3 digit numbers: 999-100+1=900.
Multiples of 3 in the range 100-999: \frac{999-102}{3}+1=300 (check this: totally-basic-94862.html#p730075).

{Total} - {# multiples of 3} = {# of not multiples of 3} --> 900-300=600.

Answer: B.

Hope it helps.
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Re: How many three-digit integers are not divisible by 3 ? [#permalink] New post 20 Dec 2012, 21:10
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What are our three-digit numbers?
100 to 999

How many numbers from 1 to 999 are divisible by 3?
\frac{999}{3}=333
999-333 = 666 numbers NOT divisible by 3

How many numbers from 1 to 99 are divisible by 3?
\frac{99}{3}=33
99-33 = 66 numbers NOT divisible by 3

666-66=600 numbers are NOT divisible by 3 from 100 to 999

Answer: B
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Re: How many three-digit integers are not divisible by 3 ? [#permalink] New post 09 Jul 2014, 06:07
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Re: How many three-digit integers are not divisible by 3 ?   [#permalink] 09 Jul 2014, 06:07
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