Mass and weight

A recipe for flapjacks calls for a certain quantity of butter, sugar and oats. Given the amount of these ingredients I have, how many flapjacks can I make?

Can you use this information to estimate how much the different fruit selections weigh in kilos and pounds?

My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.

Grandpa made a super-heavy rock cake. Five people have guessed the weight of the cake. Can you work out the weight of his cake?

Can you estimate the mass of insects caught by spiders in the UK each year?

How can you use just one weighing to find out which box contains the lighter ten coins out of the ten boxes?

On the table there is a pile of oranges and lemons that weighs exactly one kilogram. Using the information, can you work out how many lemons there are?

Grandma found her pie balanced on the scale with two weights and a quarter of a pie. So how heavy was each pie?

There are four equal weights on one side of the scale and an apple on the other side. What can you say that is true about the apple and the weights from the picture?