Physics and chemistry formulas
The formulas from the syllabus, both ways: recalling the formula for a quantity, and saying what a formula computes.
Click a card to see its answer. Series no. 205245 — this page’s address gives these exact cards again.
Other series
SI units
Matching each physical quantity with its SI unit, recognising the symbol and recalling the name behind it.
Areas and perimeters
Working out the area or the perimeter of the usual shapes — square, rectangle, triangle, disc — without opening the formula sheet.
Arithmetic with signed numbers
Adding, subtracting and multiplying signed numbers, where the signs trip up the reflexes.
Binary and hexadecimal conversions
Converting a byte between base 2, base 10 and base 16, the way the machine does.
Complex numbers
Powers of i, modulus and conjugate: the reflexes that save time on any complex-number calculation.
Decimal form of simple fractions
Going from a simple fraction to its decimal form and back to the fraction, in your head, without long division.