A little warm-up to begin...
An n-digit number is pandigital if it makes use of all the digits 1 to n exactly ONCE.
For example, the 5-digit number 15234, is 1 through 5 pandigital.
Given a positive integer find whether it is a pandigital number.
Return a list sorted by number of occurrences
Find the nearest integer
Given area find sides
Longest Collatz Sequence
Find my secret number
Find indices of diagonal elements
Sum of big primes without primes
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