Positive integer x has z factors; 3x has 3 factors; Which of the following values can z take?
Positive integer x has z factors; 3x has 3 factors; Which of the following values can z take?
I. 1
II. 2
III. 3
Answer/Solution
II only holds
Steps/Work
Squares have odd number of factors.The square which is a multiple of 3 is 9.
3 has factors 1,3 .
Therefore 2 factors
Answer C
3 has factors 1,3 .
Therefore 2 factors
Answer C