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Some of the following integers are prime. Select all the prime integers in the list.
1 2 3 4 5 6 7 8 9 10

 Jul 31, 2024
 #1
avatar+1804 
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A prime number is a number that cannot be divisble except for 1 and itself. 

 

However, 1 does not qualify, since it technically only 1 factor. 

 

Now, the numbers \(2,3,5,7\) are all prime numbers. 

 

However, \(4=2*2, 6=2*3, 8=2*4, 9=3*3, 10=2*5\)

 

So the answer is 2,3,5,7

 

Thanks! :)

 Jul 31, 2024
edited by NotThatSmart  Jul 31, 2024
 #2
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This is pretty simple. NotThatSmart already showed one way. If you know your primes, you'll find 2, 3, 5, and 7 to be prime. 

 Jul 31, 2024
 #3
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lol, yeah. "just know your primes" 

 

I love your solution, Umeko1.0 😂😂😂

 

Nice work!

NotThatSmart  Jul 31, 2024
edited by NotThatSmart  Jul 31, 2024

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