Tuesday, October 12, 2010


1.      An integer greater than 1 that is not prime is called composite. If the two-digit integer n is greater than 20, is n composite?
(1) The tens digit of n is a factor of the units digit of n.
(2) The tens digit of n is 2.









It has been mentioned in the statement that n >20

the values we can have using option 1 are


22, 24, 26, 28, 33, 36, 39, 44, 48, 55, 66, 77, 88, 99

all composite , thus A is the ans

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