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Syd chooses two different primes, both of which are greater than 20, and multiplies them. The resulting product is less than 800. How many different products could Syd have ended up with?

 Jan 11, 2024

Best Answer 

 #1
avatar+36919 
+1

Start with a list of primes > 20 

  23    29  31   37   

 

23 * 37 is too large 

so you have 

 

  23 x 29    = 667

   23 x 31   = 713 

        

          and that's it !     

 Jan 11, 2024
 #1
avatar+36919 
+1
Best Answer

Start with a list of primes > 20 

  23    29  31   37   

 

23 * 37 is too large 

so you have 

 

  23 x 29    = 667

   23 x 31   = 713 

        

          and that's it !     

ElectricPavlov Jan 11, 2024

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