What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?
This practical problem challenges you to make quadrilaterals with a loop of string. You'll need some friends to help!
This cube has ink on each face which leaves marks on paper as it is rolled. Can you work out what is on each face and the route it has taken?
Place this "worm" on the 100 square and find the total of the four squares it covers. Keeping its head in the same place, what other totals can you make?
Julia introduces the 'Lucky Dip model', and the accompanying interactivity, which take into account the impact of herd immunity.
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?
