### There are 16 results

Broad Topics >

Calculations and Numerical Methods > Estimating and approximating

##### Age 5 to 11 Challenge Level:

This activity challenges you to decide on the 'best' number to use in each statement. You may need to do some estimating, some calculating and some research.

##### Age 7 to 14 Challenge Level:

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

##### Age 7 to 11 Challenge Level:

This challenge is a game for two players. Choose two of the numbers to multiply or divide, then mark your answer on the number line. Can you get four in a row?

##### Age 5 to 11 Challenge Level:

What do you notice about the date 03.06.09? Or 08.01.09? This
challenge invites you to investigate some interesting dates
yourself.

##### Age 5 to 7 Challenge Level:

How could you estimate the number of pencils/pens in these pictures?

##### Age 7 to 11 Challenge Level:

Four Go game for an adult and child. Will you be the first to have four numbers in a row on the number line?

##### Age 7 to 11 Short Challenge Level:

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?

##### Age 7 to 11 Challenge Level:

Mr. Sunshine tells the children they will have 2 hours of homework.
After several calculations, Harry says he hasn't got time to do
this homework. Can you see where his reasoning is wrong?

##### Age 7 to 11 Challenge Level:

Find the exact difference between the largest ball and the smallest
ball on the Hepta Tree and then use this to work out the MAGIC
NUMBER!

##### Age 5 to 7 Challenge Level:

The Man is much smaller than us. Can you use the picture of him next to a mug to estimate his height and how much tea he drinks?

##### Age 7 to 11 Challenge Level:

Make an estimate of how many light fittings you can see. Was your
estimate a good one? How can you decide?

##### Age 7 to 14 Challenge Level:

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

##### Age 7 to 11 Challenge Level:

Dicey Operations for an adult and child. Can you get close to 1000 than your partner?

##### Age 7 to 14 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.

##### Age 7 to 11 Challenge Level:

Can you deduce the pattern that has been used to lay out these
bottle tops?

##### Age 7 to 14 Challenge Level:

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