Problem 44067. The last non-zero digit of a factorial
For given positive integer n, what is the last non-zero digit of n!?
Example: factorial(11) = 39916800
Last non-zero digit is 8.
Optional: Can you make an efficient algorithm for very large n?
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Number Manipulation IV
- 15 Problems
- 30 Finishers
- Pattern Sum
- Smallest n, for n! to have m trailing zero digits
- Still more miles to go before I sleep
- Convert from Base 10 to base 5
- Numbers on 7-segment
- Expand 10^n to Powers of 4
- Muphry's Law of MATLAB
- Lunar Arithmetic (Addition)
- Lunar Arithmetic (Multiplication)
- Permutation Via Multiplication
- The last non-zero digit of a factorial
- The number of trailing zero digit of a factorial
- Whole Number Concatenator
- Whole Number Un-Concatenator
- Smallest n, for n! to have m trailing zero digits
- Better Index Number
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