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?
Need a better test suite to prevent cheesy solutions like this one. :-) Some N>10 values in there would help. N>50 would be even better.
Omit columns averages from a matrix
Arrange Vector in descending order
Area of a triangle
Smallest n, for n! to have m trailing zero digits
Under the sea: Snell's law & total internal reflection
Make a rainbow matrix (follow-up to checkerboard matrix)
Fractal: area and perimeter of Koch snowflake
Number of even divisors of a given number
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office