Nikolaus Home Registration Participants Program Puzzle

[Explanation] [Get Another Puzzle]

Given numbers: 6, 8, 9, 10 Result of expression: 16 Number of possible orderings and choices of operators:

Given numbers: 3, 7, 9, 9 Result of expression: 60 Number of possible orderings and choices of operators:

Given numbers: 3, 5, 5, 8 Result of expression: 16 Number of possible orderings and choices of operators:

Questions and suggestions to Frank.Luebeck@Math.RWTH-Aachen.De.