Question 646945: I am a number between 16 and 30. The product of my two prime factors is 6. I have an even number of factors. What number am I? Answer by MathLover1(20849) (Show Source):
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given:
The product of my two prime factors is ; so, and are numbers, and they are and of ...there are two of them, means even number
, but it cannot make true
next number with same prime factors is , but it cannot make true either
only numbers that make it true are and cold be () or ()
because and ....true