Challenge Level

How many generations would link an evolutionist to a very distant ancestor?

Challenge Level

Examine these estimates. Do they sound about right?

Challenge Level

Analyse these beautiful biological images and attempt to rank them in size order.

Challenge Level

Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

Challenge Level

Estimate these curious quantities sufficiently accurately that you can rank them in order of size

Challenge Level

Work with numbers big and small to estimate and calulate various quantities in biological contexts.

Challenge Level

Work out the numerical values for these physical quantities.

Challenge Level

Get some practice using big and small numbers in chemistry.

Challenge Level

How might you use mathematics to improve your chances of guessing the number of sweets in a jar?

Challenge Level

These Olympic quantities have been jumbled up! Can you put them back together again?

Challenge Level

From the information you are asked to work out where the picture was taken. Is there too much information? How accurate can your answer be?

Challenge Level

Have you ever wondered what it would be like to race against Usain Bolt?

Challenge Level

10 graphs of experimental data are given. Can you use a spreadsheet to find algebraic graphs which match them closely, and thus discover the formulae most likely to govern the underlying processes?

Challenge Level

How many teddies are in the jar? How many teddies could you fit in your classroom?

Challenge Level

Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?

Challenge Level

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

Challenge Level

Andy is desperate to reach John o'Groats first. Can you devise a winning race plan?

Challenge Level

Choose some fractions and add them together. Can you get close to 1?

Challenge Level

Can you work out how many of each kind of pencil this student bought?

Challenge Level

Here is a chance to play a version of the classic Countdown Game.

Challenge Level

A 1 metre cube has one face on the ground and one face against a wall. A 4 metre ladder leans against the wall and just touches the cube. How high is the top of the ladder above the ground?

Challenge Level

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

Challenge Level

There are nasty versions of this dice game but we'll start with the nice ones...

Challenge Level

In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.

Challenge Level

How many ways can you find to put in operation signs (+ - x รท) to make 100?

Challenge Level

Bluey-green, white and transparent squares with a few odd bits of shapes around the perimeter. But, how many squares are there of each type in the complete circle? Study the picture and make. . . .

Challenge Level

Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.