The letters of the word ABACUS have been arranged in the shape of a
triangle. How many different ways can you find to read the word
ABACUS from this triangular pattern?
Intersection Sudoku 1
Age 11 to 16 Challenge Level:
A clue like 2567 in cell (8,2) confirms the positions of four
of the numbers in the surrounding 3x3 square.
It is useful to remember that the same number cannot appear in
the same row or in the same 3x3 square. This can help with a clue
such as1223 in cell (8,6) because it tells you the position of one
of the twos.
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.