+0  
 
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5
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How many ordered pairs of primes (a,b) satisfy a+b=22?

 Jan 13, 2024
edited by ruiruima  Jan 13, 2024
 #1
avatar+128732 
+2

(3 , 19)

(19, 3)

(5, 17)

(17, 5)

 

cool cool cool

 Jan 14, 2024

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