What's My Number?
puzzle, math, number


 

Puzzles

Daily Puzzles
Logic / Math
Memory
Trivia
Visual
Word
Printable

      

Features

Puzzle Blog
PuzzleWear
Contests
Interviews
Books
Websites
Contact Us

  


Original Puzzle Monster E-books

  puzzle book    

Spot the Alien

Use logic to find the alien invaders!

Only $1.99!

   

  puzzle book    

Puzzle Monster Presents: Chained Melodies

Unravel the titles of famous songs!

Only $1.99!

    

 

What's My Number?

Puzzle 7

Difficulty:
Fun:
(based on 19 votes)

I am thinking of a whole number between 1 and 20, inclusive.
  • My number is either less than the smaller possible value of x in the equation 20x-x^2=96 or greater than the larger possible value of x in the same equation.
  • My number is neither less than the smaller possible value of x in the equation 20x-x^2=75 nor greater than the larger possible value of x in the same equation.
  • My number is not a factor of 210.

What is my number?

Back to the What's My Number? Index!

© 2004-2010 Eric Shamblen - all rights reserved
No content may be reproduced without permission of the author.