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For which of the following numbers does the sum of its prime
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15 Oct 2018, 09:39
15 Oct 2018, 09:39
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Question Stats:
45% (01:41) correct
54% (02:27) wrong based on 68 sessions
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For which of the following numbers does the sum of its prime factors equal the sum of the prime factors of 420?
Indicate all possible choices.
A. 52
B. 104
C. 150
D. 176
E. 450
Indicate all possible choices.
A. 52
B. 104
C. 150
D. 176
E. 450
Re: For which of the following numbers does the sum of its prime
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22 Oct 2018, 00:47
22 Oct 2018, 00:47
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sum of prime factors of 420 -> 2+3+7+2+5 = 19
Lets see at answers-
A. 52 -> 2+2+13 = 17
B. 104 -> 2+2+2+13 =19 YES
C. 150 -> 2+5+3+5 = 15
D. 176 -> 2+2+2+2+11 = 19 YES
E. 450 -> 3+3+5+5+2 = 18
The answer is B, D
Lets see at answers-
A. 52 -> 2+2+13 = 17
B. 104 -> 2+2+2+13 =19 YES
C. 150 -> 2+5+3+5 = 15
D. 176 -> 2+2+2+2+11 = 19 YES
E. 450 -> 3+3+5+5+2 = 18
The answer is B, D
Re: For which of the following numbers does the sum of its prime
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22 Oct 2018, 01:23
22 Oct 2018, 01:23
Expert Reply
For which of the following numbers does the sum of its prime factors equal the sum of the prime factors of 420?
Indicate all possible choices.
\(420=2*2*3*5*7.....2+2+3+5+7=19\)
A. 52 .....\(2*2*13....2+2+13=17\)
B. 104 .....\(104=52*2,....17+2=19\)..yes
C. 150 ......\(150=2*3*5*5....2+3+5+5=15\)
D. 176 ......\(176=2*2*2*2*11.....2+2+2+2+11=19\)..yes
E. 450 ......\(150*3.....15+3=18\)
So B and D
Indicate all possible choices.
\(420=2*2*3*5*7.....2+2+3+5+7=19\)
A. 52 .....\(2*2*13....2+2+13=17\)
B. 104 .....\(104=52*2,....17+2=19\)..yes
C. 150 ......\(150=2*3*5*5....2+3+5+5=15\)
D. 176 ......\(176=2*2*2*2*11.....2+2+2+2+11=19\)..yes
E. 450 ......\(150*3.....15+3=18\)
So B and D
