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?
Stage: 2 Challenge Level:
You might find it helpful to print out this sheet of the numbers.
Which numbers do you know?
Can you see any similarities between any of the numbers?
Which numbers are the 'shortest' and the 'longest'?
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities
can be found here.