If we start with 2 and build up one digit at a time creating the smallest number with a certain property we get the number 20120456708436008 before we have to stop. What do we get if we start with the...
Should I live long enough to see it, on my birthday in the year 2025, my age will be equal to the sum of the digits of my birth year. I will still be less than 100 years old. What is my birth year and...