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If Brian bought four times as many pencils as Kelly, what could be the

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Intern
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If Brian bought four times as many pencils as Kelly, what could be the  [#permalink]

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New post 21 Sep 2018, 08:24
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A
B
C
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Difficulty:

  15% (low)

Question Stats:

78% (00:33) correct 22% (00:37) wrong based on 32 sessions

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If Brian bought four times as many pencils as Kelly, what could be the total amount of pencils bought?

a) 7
b) 12
c) 15
d) 18
e) 21

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Joined: 17 Aug 2018
Posts: 18
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Re: If Brian bought four times as many pencils as Kelly, what could be the  [#permalink]

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New post 21 Sep 2018, 08:37
If the number of pencils bought by Kelly is x then Brian bought 4x pencils.

Total no. of pencils bought is 5x. Only one option is divisible by 5 which is 15.

The correct answer is C

Posted from my mobile device
Intern
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Joined: 26 Apr 2018
Posts: 39
Re: If Brian bought four times as many pencils as Kelly, what could be the  [#permalink]

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New post 21 Sep 2018, 08:41
Kritika2008poddar wrote:
If the number of pencils bought by Kelly is x then Brian bought 4x pencils.

Total no. of pencils bought is 5x. Only one option is divisible by 5 which is 15.

The correct answer is C

Posted from my mobile device


Did you add x to 4x? I'm a bit confused by that bit
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Re: If Brian bought four times as many pencils as Kelly, what could be the  [#permalink]

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New post 23 Sep 2018, 14:28
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Top Contributor
bettatantalo wrote:
If Brian bought four times as many pencils as Kelly, what could be the total amount of pencils bought?

a) 7
b) 12
c) 15
d) 18
e) 21


Brian bought four times as many pencils as Kelly

Let x = the number of pencils that Kelly bought
So 4x = the number of pencils that Kelly bought

TOTAL number of pencils purchased = (number of pencils that Kelly bought) + (number of pencils that Brian bought)
= x + 4x
= 5x

So, the TOTAL number of pencils purchased equals 5x
This means the TOTAL number of pencils purchased must be divisible by 5

Check the answer choices......
Only answer choice C is divisible by 5

Answer: C

Cheers,
Brent
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Re: If Brian bought four times as many pencils as Kelly, what could be the &nbs [#permalink] 23 Sep 2018, 14:28
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If Brian bought four times as many pencils as Kelly, what could be the

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