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What is the sum of the different positive prime factors of 550?

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Joined: 17 Dec 2007
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What is the sum of the different positive prime factors of 550?  [#permalink]

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Updated on: 05 Mar 2015, 06:16
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What is the sum of the different positive prime factors of 550?

A. 10
B. 11
C. 15
D. 16
E. 18

Originally posted by mbsnyc on 17 Dec 2007, 17:23.
Last edited by Bunuel on 05 Mar 2015, 06:16, edited 1 time in total.
Renamed the topic, edited the question, added the OA and moved to PS forum.
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Re: What is the sum of the different positive prime factors of 550?  [#permalink]

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17 Dec 2007, 19:09
2
mbsnyc wrote:
What is the sum of the different positive prime factors of 550?

550

55*10 --> 5*11*2*5 --> 5+11+2=18. Remember its asking for the DIFFERENT positive prime factors of 550.
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Re: What is the sum of the different positive prime factors of 550?  [#permalink]

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17 Dec 2007, 19:23
550 = 5*11*5*2

5+11+2 = 18
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Re: From MitDavidDv: Prime Factor Question  [#permalink]

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01 Jun 2011, 13:40
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MitDavidDv wrote:
What is the sum of the different positive prime factors of 550?
A. 10
B. 11
C. 15
D. 16
E. 18

$$550=275*2=25*11*2=5*5*11*2=5^2*11*2$$

Different prime numbers are 5, 11 and 2.

Sum=5+11+2=18

Ans: "E"
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Re: From MitDavidDv: Prime Factor Question  [#permalink]

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01 Jun 2011, 14:10
Shalom!

550= 5^2+2+11=18
The prime factors are 5, 2 and 11 therefore the answer is E.
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Re: From MitDavidDv: Prime Factor Question  [#permalink]

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01 Jun 2011, 15:08
different prime factors of 550 are 2 , 5, 11

=> sum of prime factors = 2+5+11 = 18

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Re: What is the sum of the different positive prime factors of 550?  [#permalink]

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08 May 2018, 11:30
mbsnyc wrote:
What is the sum of the different positive prime factors of 550?

A. 10
B. 11
C. 15
D. 16
E. 18

To determine the sum of the different positive prime factors of 550, let’s break 550 into its prime factorization.

550 = 55 x 10 = 5 x 11 x 5 x 2

The different prime factors of 550 are 5, 11, and 2 and the sum of these prime factors is 5 + 11 + 2 = 18.

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Re: What is the sum of the different positive prime factors of 550?  [#permalink]

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20 Aug 2019, 17:17
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Re: What is the sum of the different positive prime factors of 550?   [#permalink] 20 Aug 2019, 17:17
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