Problem 2193. Mysterious digits operation (easy)

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

Solution Comments

Problem Recent Solvers315

Suggested Problems

• Make the vector [1 2 3 4 5 6 7 8 9 10]

  52552 Solvers

• Select every other element of a vector

  35952 Solvers

• Back to basics 8 - Matrix Diagonals

  960 Solvers

• Symmetry of vector

  1247 Solvers

• Flip the vector from right to left

  10617 Solvers

More from this Author43

• Pandigital number n°3 (Inspired by Project Euler 32)

  43 Solvers

• Additive persistence

  181 Solvers

• Sum of big primes without primes

  239 Solvers

• Expression or variable?

  23 Solvers

• Replicate elements in vectors

  1222 Solvers