- Thu Apr 02, 2009 12:22 pm
- Forum: Arithmetic
- Topic: need to know a number that has exactly 11 factors??
- Replies:
**4** - Views:
**4489**

Take any 11 primes at random and multiply them to get your desired number

- Wed Apr 01, 2009 3:31 pm
- Forum: Geometry
- Topic: Circles and Parabola: find smallest circle touching 2 parabs
- Replies:
**4** - Views:
**4191**

Yes i did calculus,I don't know how to approach the sum.

- Wed Apr 01, 2009 2:00 pm
- Forum: Geometry
- Topic: Circles and Parabola: find smallest circle touching 2 parabs
- Replies:
**4** - Views:
**4191**

Consider two parabolas

&

Find the equation of circle of minimum radius touching both the parabolas.

&

Find the equation of circle of minimum radius touching both the parabolas.