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Syd chooses two different primes, and multiplies them. If both primes are greater than 4, and the resulting product is less than 600, then how many different products could Syd have ended up with?

 Mar 24, 2024
 #1
avatar+128399 
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Primes are

5  7   11   13    17   19    23   

 

C(7,2)  =  21 different  products

 

cool cool cool

 Mar 24, 2024

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