Mental Math
9 drills
- Mental ArithmeticSharpen quick recall of addition, subtraction, multiplication, and division.
- PercentagesMental percents of a number — tips, discounts, and more.
- Order of OperationsEvaluate expressions with the right precedence (PEMDAS).
- Powers of TwoRecall 2ⁿ — the numbers behind bytes, bits, and binary.
- Squares & RootsPerfect squares and their roots, on sight.
- Greatest Common DivisorFind the largest number that divides both.
- Prime or CompositeSnap-judge whether a number is prime.
- Next in SequenceSpot the pattern and give the next term.
- LogarithmsEvaluate a logarithm — the exponent that gets you there.