Maths questions often start with the command words 'calculate' or 'determine'. They will then have a blank space for you to show your working. It is important that you show your working; don't just write the answer down. You might earn marks for your working even if you get the answer incorrect.
In some maths questions you will be required to give the units. This may earn you an additional mark. Don't forget to check whether you need to do this.
Maths questions might include graphs and tables as well as calculations. Don't forget to take a ruler and calculator.
If drawing graphs, make sure you:
If you are asked to calculate an answer and it has lots of decimal places, don't forget to use the same number of significant figures as the data in the question. For example, if two significant figures are used in the question, then usually your answer would also be to two significant figures. Don't forget to check your rounding.
Edexcel questions courtesy of Pearson Education Ltd.
This is a table that shows the surface area (SA) to volume (V) ratio in three different sized cubes
|Cube size (cm)||Surface area / SA (sq cm)||Volume / V (sq cm)||SA:V ratio|
Calculate the SA:V ratio for the 2 cm cube. [2 marks]
24 ÷ 8 = 3 
Ratio = 3:1 
A student recorded the change in oxygen levels in three containers of germinating peas (A, B and C) over a 30-minute period.
The unit they used was O2 used/ml.
The results are shown below.
A - 10 mins 0.8 ml, 20 mins 1.6 ml, 30 mins 2.4 ml
B - 10 mins 0.1 ml, 20 mins 0.1 ml, 30 mins 0.1 ml
C - No change
Complete the table for these results. [2 marks]
 for a headed table with units
 mark for putting the results in the right places
|O2 used/ml at 10 mins||0.8||0.1||0.0|
|O2 used/ml at 20 mins||1.6||0.1||0.0|
|O2 used/ml at 30 mins||2.4||0.1||0.0|
Calculate the rate of oxygen consumption per second for the results in respirometer A. [2 marks]
2.4 ÷ (30 × 60) 
= 0.0013 ml/second 
Or 1.6 ÷ (20 × 60) = 0.0013 ml/second
Or 0.8 ÷ (10 × 60) = 0.0013 ml/second