All series shuffled together
Each card is drawn from a random series, anywhere in the catalogue: you have to recognise what is being asked before you can answer it.
Click a card to see its answer. Series no. 378714 — this page’s address gives these exact cards again.
Other series
Times tables
The 2 to 12 times tables, both ways round: the product asked for, or the missing factor.
Order of operations
Chaining additions, multiplications and brackets in the right order, without falling for how the calculation is written.
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.
Fractions in lowest terms
Reducing a fraction to its lowest terms by spotting the common divisor at a single glance.
Sums of fractions
Adding or subtracting two fractions and giving the result in its lowest terms.
Percentages of a number
Taking a simple percentage of a number, and recognising an increase or a decrease.