Posted by karen on Tuesday, February 23, 2010 at 7:59pm.
If it has exactly 9 factors, it must be a perfect square, as only perfect squares have an odd number of factors (including 1 and the number itself).
Between 20 and 50, there are 3 perfect squares, only one of which has more than three factors.
Post if further help is required.
Related Questions
math - I am a prime number. I am less than 40. I am 1 more than a multiple of 5...
math - I'm thinking of a number made from the digits 3,6 and 9. Each digit ...
math - i am a number between 20 and 30. when u divide me into 6 equal groups, ...
math - i am a number between 20 and 30. when you put me into 6 equal groups, ...
math - i am a number between 20 and 30. put me into 6 equal groups.ther is a ...
math - What if Julie is thinking of an even number between 12 and 29with digits ...
math - julie is thinking of an even number between 12 and 29 with digits whose ...
math - three of these puzzles have more than one answer. try to find all the ...
2nd grade - i am a number between 20 and 30, when you put me into 6 equal groups...
math - i am a number between 20 and 30. when you put me into 6 equal groups, ...
For Further Reading
