Saturday

April 19, 2014

April 19, 2014

Posted by **karen** on Tuesday, February 23, 2010 at 7:59pm.

- math -
**MathMate**, Tuesday, February 23, 2010 at 8:35pmIf 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 - Eduardo thinks of a number between 1 and 20 that has exactly 5 factors. ...

math - Eduardo thinks of a number between 1 and 20 that has exactly 5 factors . ...

math - I'm thinking of a number made from the digits 3,6 and 9. Each digit is ...

math - I am a prime number. I am less than 40. I am 1 more than a multiple of 5...

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 prime number between 40 and 50. If you add one to me, the sum of ...

math - I am a prime number between 40 and 50. If you add one to me, the sum of ...

Math - I am a prime number between 40 and 50. If you add one to me the sum of ...

math - i am a number between 20 and 30. put me into 6 equal groups.ther is a ...