Follow the clues to find the mystery number.
What do the digits in the number fifteen add up to? How many other
numbers have digits with the same total but no zeros?
A church hymn book contains 700 hymns. The numbers of the hymns are
displayed by combining special small single-digit boards. What is
the minimum number of small boards that is needed?
Nicely done Adam from Poltair Community
School and Sports College, Cornwall!
A big thank you too to Michael for your
elegant method of finding the sum of all 3 digit numbers each of
whose digits is odd: