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?
Suppose we allow ourselves to use three numbers less than 10 and
multiply them together. How many different products can you find?
How do you know you've got them all?
Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?
We received many, many solutions to this What Do You Need? problem, but not so many of you explained how you came to the solution and which clues were useful and which weren't.
Just to warn you - the clues are ordered slightly differently on the printable sheet compared with in the problem itself so do read the solutions below carefully!
Holly from Sacred Heart School in New Zealand told us:
Children at St Faith's School worked together and sent us the following solution
Cong also explained clearly how he went about the problem:
Thank you in particular to Vasil from Slivern, Bulgaria; Isobel from Springfield Primary; and Alex who also sent us clear solutions.