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# A deck of cards is 1.5 centimeters thick. If each of the cards is 0.0

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Math Expert
Joined: 02 Sep 2009
Posts: 55188
A deck of cards is 1.5 centimeters thick. If each of the cards is 0.0  [#permalink]

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19 Feb 2018, 22:47
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Difficulty:

5% (low)

Question Stats:

89% (00:36) correct 11% (00:42) wrong based on 87 sessions

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A deck of cards is 1.5 centimeters thick. If each of the cards is 0.03 centimeters thick, how many cards are in the deck?

(A) 45

(B) 50

(C) 450

(D) 500

(E) 1500

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Re: A deck of cards is 1.5 centimeters thick. If each of the cards is 0.0  [#permalink]

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19 Feb 2018, 22:59
1
No of cards= $$\frac{1.5}{0.03}$$= $$\frac{15}{10}$$*$$\frac{100}{3}$$ =50

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Re: A deck of cards is 1.5 centimeters thick. If each of the cards is 0.0  [#permalink]

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23 Feb 2018, 06:21
A deck of cards is 1.5 centimeters thick. If each of the cards is 0.03 centimeters thick, how many cards are in the deck?

(A) 45

(B) 50

(C) 450

(D) 500

(E) 1500

Multiply numerator and denominator by 100:
150/3 = 50

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Joined: 12 Sep 2015
Posts: 3717
Re: A deck of cards is 1.5 centimeters thick. If each of the cards is 0.0  [#permalink]

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23 Feb 2018, 10:03
1
Top Contributor
Bunuel wrote:
A deck of cards is 1.5 centimeters thick. If each of the cards is 0.03 centimeters thick, how many cards are in the deck?

(A) 45

(B) 50

(C) 450

(D) 500

(E) 1500

We need to determine the number of times 0.03 cm (the thickness of ONE card) divides into 1.5 cm (the thickness of the entire deck)
In other words, we must evaluate 1.5/0.03

IMPORTANT: Rather than perform long division with decimals (yuck!!), we can take 1.5/0.03 and create an equivalent fraction

Take 1.5/0.03 and multiply numerator and denominator by 100 to get: 150/3
At this point, it's easy to see that 150/3 evaluates to 500

So, 1.5/0.03 = 150/3 = 50

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Re: A deck of cards is 1.5 centimeters thick. If each of the cards is 0.0  [#permalink]

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20 Mar 2019, 08:46
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Re: A deck of cards is 1.5 centimeters thick. If each of the cards is 0.0   [#permalink] 20 Mar 2019, 08:46
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