Make a function which takes one positive integer n and returns a matrix with the numbers of the form (2^i)*(3^j)*(5^k) which are lower or equal to n (i,j,k integers).
Check if sorted
Increment a number, given its digits
High school cafeteria
Project Euler: Problem 6, Natural numbers, squares and sums.
Back to basics 6 - Column Vector
Iterative sum of digits of 2^n number
Maximum of ND-array
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