Having the right calculator for A Level Mathematics (9709) is almost like legally cheating. You are allowed to use scientific calculators, but they cannot have graphical capabilities or symbolic algebra (CAS).
The Gold Standard: Casio fx-991EX (ClassWiz)
This is the most highly recommended calculator by teachers worldwide. It can:
- Solve quadratic and cubic equations instantly.
- Solve simultaneous equations with up to 4 unknowns.
- Perform numerical integration and differentiation (crucial for checking your calculus answers in P3).
- Calculate summary statistics (mean, variance) and binomial probabilities directly from a table (essential for S1 and S2).
The Upgrade: Casio fx-991CW
This is the newer model replacing the EX. It has a slightly different menu system but boasts a faster processor and a crisper display.
What to Avoid
Do not use basic calculators like the fx-82MS. They lack equation solvers, which will waste precious minutes during the exam. Also, ensure your calculator does not have a 'solve symbolically' function, as these will be confiscated by invigilators.