Are these estimates of physical quantities accurate?
Work with numbers big and small to estimate and calulate various quantities in biological contexts.
Examine these estimates. Do they sound about right?
Analyse these beautiful biological images and attempt to rank them in size order.
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
How many generations would link an evolutionist to a very distant
Work out the numerical values for these physical quantities.
Get some practice using big and small numbers in chemistry.
How might you use mathematics to improve your chances of guessing the number of sweets in a jar?
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?
In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.
Unmultiply is a game of quick estimation. You need to find two
numbers that multiply together to something close to the given
target - fast! 10 levels with a high scores table.
Practise your skills of proportional reasoning with this interactive haemocytometer.
Here is a chance to play a version of the classic Countdown Game.
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. . . .
According to an old Indian myth, Sissa ben Dahir was a courtier for
a king. The king decided to reward Sissa for his dedication and
Sissa asked for one grain of rice to be put on the first square. . . .
Can you work out how many of each kind of pencil this student
There are nasty versions of this dice game but we'll start with the nice ones...
Who said that adding, subtracting, multiplying and dividing
couldn't be fun?