What 3 concepts are covered in the Digit Problems Calculator?
combination
a mathematical technique that determines the number of possible arrangements in a collection of items where the order of the selection does not matter nPr = n!/r!(n - r)!
digit
Any of the numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) used to construct a number
digit problems
math problems involving variables for each place value, h for hundreds, t for tens, and o for ones as an example
