Chris problems are kinda my favourite :)
Very nice problem
Return the first and last characters of a character array
Find nearest prime number less than input number
Large Sum (inspired by Project Euler 13)
Last non-zero digit
List the Moran numbers
List the delete-a-digit primes
Iterate the sum of divisors and totient
Investigate the frequency of last digits of prime numbers
Determine whether a number is a fibodiv number
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