SOLUTION: How many integers greater than 20 and less than 30 are each the product of exactly two different numbers,both of which are prime ?
(A) 0 (B) 1 (C) 2 (D) 3 (E) 4
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Divisibility and Prime Numbers
-> SOLUTION: How many integers greater than 20 and less than 30 are each the product of exactly two different numbers,both of which are prime ?
(A) 0 (B) 1 (C) 2 (D) 3 (E) 4
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Question 297252: How many integers greater than 20 and less than 30 are each the product of exactly two different numbers,both of which are prime ?
(A) 0 (B) 1 (C) 2 (D) 3 (E) 4
You can put this solution on YOUR website! 21 3 7 both prime 1
22 11 2 both prime 2
23 prime
24 4 6 3 8
25 5 and 5 both prime but not different
26 13 2 both prime 3
27 3 9 not prime
28 7 4 not prime
29 prime
3 with different factors both prime
