Nikolaus Home Registration Participants Program Puzzle

[Explanation] [Get Another Puzzle]

Given numbers: 2, 4, 6, 10 Result of expression: 14 Number of possible orderings and choices of operators:

Given numbers: 4, 7, 8, 9 Result of expression: 10 Number of possible orderings and choices of operators:

Given numbers: 3, 8, 9, 9 Result of expression: 5 Number of possible orderings and choices of operators:

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