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What is the sum of all the prime factors of 220 and 330?

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What is the sum of all the prime factors of 220 and 330?  [#permalink]

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New post 14 Apr 2016, 02:34
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

58% (01:21) correct 42% (01:16) wrong based on 185 sessions

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Re: What is the sum of all the prime factors of 220 and 330?  [#permalink]

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New post 14 Apr 2016, 04:00
Prime factorization of the given numbers

220 = 2^2 * 5 * 11
330 = 2*3*5* 11

Sum = 4+5+11 + 2+3+5+11
=20 + 21
=41
Answer D
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What is the sum of all the prime factors of 220 and 330?  [#permalink]

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New post 21 Apr 2016, 12:09
Very Confusing This question.
The answer can either be 41 or 21.
Here => What in sum of all the prime factors we are counting them twice and thrice.
Bit odd.

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StoneCold
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Re: What is the sum of all the prime factors of 220 and 330?  [#permalink]

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New post 24 Jul 2016, 03:58
Prime factorization of both the numbers is as follows
220 = 2 * 2 * 5 * 11
sum of the prime factors of 220 = 20
330 = 2 *3 * 5 * 11
sum of prime factors of 330 = 21
addition of both = 20 + 21 = 41
correct Answer - D
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Re: What is the sum of all the prime factors of 220 and 330?  [#permalink]

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New post 24 Jul 2016, 05:15
stonecold wrote:
Very Confusing This question.
The answer can either be 41 or 21.
Here => What in sum of all the prime factors we are counting them twice and thrice.
Bit odd.

Regards
StoneCold


I suppose u factozied both together the way I did
lets try
220 330
11 20 30
2 10 15
5 2 3
11+2+5= 18 (not in the option)

Im doing something wrong
let me seprate & answer will be 41 :)
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Re: What is the sum of all the prime factors of 220 and 330?  [#permalink]

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New post 29 Nov 2016, 19:30
220 =(2^2)(5)(11) --> sum = 20

330 =(2)(3)(5)(11) --> sum = 21

20+21 = 41

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Re: What is the sum of all the prime factors of 220 and 330?  [#permalink]

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New post 28 Jan 2019, 17:34
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Re: What is the sum of all the prime factors of 220 and 330?   [#permalink] 28 Jan 2019, 17:34
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