Problem 2193. Mysterious digits operation (easy)

 0    -> 0
 1    -> 9
 121  -> 9
 44   -> 6
 15   -> 5
 1243 -> 7
 ...

Solution Comments

Problem Recent Solvers281

Suggested Problems

• Is A the inverse of B?

  920 Solvers

• Create a Multiplication table matrix...

  446 Solvers

• Matrix to column conversion

  345 Solvers

• Smith numbers

  581 Solvers

• Fibonacci-Sum of Squares

  1294 Solvers

More from this Author43

• Bouncy numbers

  34 Solvers

• Two functions (to be sure)

  18 Solvers

• Negation and new variables

  21 Solvers

• BLOCK x3 (Version 4)

  5 Solvers

• How many monitors are connected ?

  151 Solvers