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01 Dec 2022, 02:30
Kudos
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C
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Difficulty:
95%
(hard)
Question Stats:
42% (02:09) correct
58%
(02:10)
wrong
based on 83
sessions
History
Date
Time
Result
Not Attempted Yet
How many positive integers no greater than 20 can be expressed as the sum of two different prime numbers?
A. 11
B. 12
C. 13
D. 14
E. 15
A. 11
B. 12
C. 13
D. 14
E. 15
01 Dec 2022, 04:26
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Bunuel
We can create a table as shown to find the sum. There are 13 numbers less than equal to 20 which can be expressed as sum of two different prime numbers.
Option C
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Screenshot 2022-12-01 165256.png [ 23.35 KiB | Viewed 1944 times ]
15 Mar 2025, 03:49
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