Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

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. Calculation errors carried forward are worked through to give credit for later working.

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. Take extra care when converting between units.

Maths questions might include graphs and tables as well as calculations. Don’t forget to take a ruler and scientific calculator.

If drawing graphs, make sure you:

- put the independent variable on the x-axis and the dependent variable on the y-axis
- construct regular scales for the axes
- label the axes appropriate
- plot each point accurately
- draw a straight or curved line of best fit

If you are asked to calculate an answer and it has lots of decimal places, don't forget to only use one more than the data in the question. For example, if whole numbers are given in the question, then your answer would be to one decimal place. Don't forget to check your rounding.

*These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.*

- Question
A Year 11 form tutor recorded the number of students off sick each day for a week. The results are shown in the table below.

Monday Tuesday Wednesday Thursday Friday Class 11A 6 5 5 5 4 Calculate the mean number of students off sick.

**[1 mark]**To calculate a mean all the values must be added up and then divided by the total number of values.

- Question
A class of Year 9 students planted twelve barley seeds on cotton wool in petri dishes on a windowsill. Six were watered with fertilisers and six were given the same volume of pure water. The heights of the six seedlings were measured after two weeks.

Plant Height with fertiliser Height without fertiliser 1 2 cm 2 cm 2 3 cm 3 cm 3 4 cm 2 cm 4 3 cm 1 cm 5 6 cm 2 cm 6 5 cm 2 cm What is the median result with and without fertilisers?

**[2 marks]**To calculate the median, place the set of numbers in increasing order of size. The median is the middle number. In increasing order of size with fertilisers: 2, 3, 3, 4, 5, 6. The answer is therefore 3.5. (If the median falls between two numbers, then the mean of these is used. Here it is 3.5 which is the mean of 3 and 4.) In increasing order of size without fertilisers: 1, 2, 2, 2, 2, 3. The answer is therefore 2.

- Question
The number of people living with HIV each year is recorded by the UN. The date for recent years is shown in the table below.

Data from UNAIDS Year 2000 2005 2010 2011 2012 2013 2014 2015 Infected people (millions) 28.9 31.8 33.3 33.9 34.5 35.2 35.9 36.7 Plot these points on graph paper. Draw a line of best fit.

**[4 marks]**Your graph should look like this.

You should have years on the x-axis and number of infected people (millions) on the y-axis [2]. Your scales should be regular [1]. Your axes should be labelled [1]. All points should be accurate [1] and you should have drawn a curved line of best fit [1].

- Question
A mother recorded the temperature of her young child when they had the measles. The table below shows the results.

Time after symptoms first noticed (hours) 24 48 72 96 Temperature 37.9°C 38.3°C 39.2°C 37.5°C Calculate the rate of change per hour for the first three days. Give your answer to two significant figures.

**[1 mark]**The question asks for the rate change per hour. So make sure you don't calculate the rate of change per day instead.

You would do this by: .

Remember to read the question closely. It asks for the first three days not four, so you should ignore the data for the fourth day.