Being collaborative

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?

These clocks have been reflected in a mirror. What times do they say?

Which is quicker, counting up to 30 in ones or counting up to 300 in tens? Why?

Can you replace the letters with numbers? Is there only one solution in each case?

Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.

Use the two sets of data to find out how many children there are in Classes 5, 6 and 7.

These sixteen children are standing in four lines of four, one behind the other. They are each holding a card with a number on it. Can you work out the missing numbers?

Place the numbers from 1 to 9 in the squares below so that the difference between joined squares is odd. How many different ways can you do this?

How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.

Have a look at this table of how children travel to school. How does it compare with children in your class?