1 out of 3
Does this 'trick' for calculating multiples of 11 always work? Why or why not?
1 out of 3
Complete the Mathdoku grid using the clues. Can you convince us that the number you have chosen for each square has to be correct?
2 out of 3
2 out of 3
Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?
2 out of 3
If you had any number of ordinary dice, what are the possible ways of making their totals 6? What would the product of the dice be each time?
2 out of 3
2 out of 3
In a Magic Square all the rows, columns and diagonals add to the 'Magic Constant'. How would you change the magic constant of this square?
2 out of 3
2 out of 3
Cherri, Saxon, Mel and Paul are friends. They are all different ages. Can you find out the age of each friend using the information?
