Comparing four-sided and six-sided dice
Find the largest palindrome made from the product of two 3-digit numbers.
Find the smallest number divisible by each of the numbers 1 to 20.
Find the number of routes from the top left corner to the bottom right corner in a rectangular grid.
Maximum sum from top to bottom of triangular array.
Evaluate the sum of all amicable pairs under 10,000.
Calculate the total of all the name scores in the file of first names.
Find the sum of both diagonals in a square spiral.
Find the sum of all numbers which are equal to the sum of the factorial of their digits.
Compose Champernowne’s constant