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.
Add two numbers
Find the alphabetic word product
The Goldbach Conjecture
Number of 1s in the Binary Representation of a Number
Add more zeros
Find indices of diagonal elements
BLOCK x3 (Version 3)
Rank of magic square (for beginners)
Generalised Hamming Number
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