**Predictions for the Calculator paper 2015**

This is my best guess as to the topics that will be covered in the second paper. Notice it is just my best guess please don’t rely on this absolutely!

**Number**

- Do a hard calculation using the calculator and show all of the digits from the screen then round it
- Compound interest. In recent year they have split the question so it might say in the first year the interest rate is 5% and then in all the years that follow it is 3%. They have also asked questions comparing simple and compound interest.
- Reverse percentage
- Equivalence of decimals, fractions and percentages.
- Ratios. Read the question carefully!
- A context question with calculations such as percentages and fractions – check your QWC
- Proportion eg S is proportional to the square of t
- Bounds calculations. Pick out the right combination of upper and lower bounds for the calc.

**Algebra**

- Trial and improvement
- Solve a quadratic using the formula
- There is usually a page of algebra involving factorising, expanding, simplifying and solving etc
- Forming an equation from a situation and then solving it. Eg the sides are given algebraically and you are given the value of the perimeter.
- An algebraic proof question
- Completing the square (and maybe using it to find the lowest value an expression can produce)P
- Plotting a harder graph eg a quadratic curve. Or maybe finding the equation of a line through two points.

**Shape and space**

- Trigonometry and Pythagoras’ – possibly questions that disguise the technique required
- Advanced trig – sine rule and cosine rules and don’t forget the area formula
- Similar triangles question. Or prove that the triangles are congruent with ASA, SAS, SSS, RHS etc
- Area of circle in some form e.g. find the area of a sector
- Loci –construct a triangle using compasses, the perpendicular bisector, the angle bisector, points that are equidistant from a point and also from a line
- Volumes and surface areas of solids – could involve similar solids, so make sure you know how the scale factors are related to each other.
- Vectors – often set up within a triangle; make sure you can work out the vector for the third side if you know the other two.

**Statistics and Probability**

- Histograms
- Averages from a frequency table or a grouped frequency table
- Sampling
- A more basic graph type such as a Pie chart or a frequency polygon
- Tree diagram or sample space diagram eg Possible to have a two dice question or an equivalent

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