This is a game for two players. What must you subtract to remove the rolled digit from your number? The first to zero wins!
Can you use the clues to complete these 3 by 3 Mathematical Sudokus?
Can you spot the similarities between this game and other games you know? The aim is to choose 3 numbers that total 15.
Can you use the clues to complete these 6 by 6 Mathematical Sudokus?
Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?
An ordinary set of dominoes can be laid out as a 7 by 4 magic rectangle in which all the spots in all the columns add to 24, while those in the rows add to 42. Try it! Now try the magic square...
This Sudoku combines all four arithmetic operations.
The puzzle can be solved with the help of small clue-numbers which are either placed on the border lines between selected pairs of neighbouring squares of the grid or placed after slash marks on the intersections between two diagonally adjacent squares.
In this article for primary teachers, Ems outlines how we can encourage learners to be flexible in their approach to calculation, and why this is crucial.
