Would the ANS to this be 33?
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yes 33 is correct
Can you explain how?
yea, so to find a non-prime, you find the next prime and double it. For ex: if the question asked what is the smallest* nonprime that is not a factor, the ANS would be 22, because 11*2 is 22. 11 is the smallest number that is not a factor, and doubling makes it nonprime. Since this question is asking for the 3rd smallest, you can triple, 11, or 13.
3 X 11 is smaller than 3 X 13 so the ANS is 33.
Hope that is clear.
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Yup Gotcha. Thanks
In this question it is right, but you just have to make sure that other computations with primes won’t be smaller. Here the smallest is, as you said, 2x11, then it’s 2x13, then it is truly 3x11 but just because 17 is the next prime and 2x17>3x11. If 14, 15, or 16 were a prime 2x that number would be smaller.
This is just to say that, if they ask you for the third smallest, you cannot automatically assume that 3x the smallest prime number will be that number.
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yes! excellent point