Math
20 gamesArithmetic, estimation, number theory, and statistics. Scroll down for quick reference tables to help you study.
Random Mix — Math
A shuffled session pulled from games in this scope. Same scoring style across the whole session. Pick a difficulty to start.
Quick Reference
log₁₀(n) answers “what power of 10 equals n?” Key identity: log₁₀(a × b) = log₁₀(a) + log₁₀(b)
| n | log₁₀(n) | Exact? |
|---|---|---|
| 1 | 0 | exact |
| 2 | ≈ 0.3010 | approx |
| 3 | ≈ 0.4771 | approx |
| 4 | ≈ 0.6021 | approx |
| 5 | ≈ 0.6990 | approx |
| 6 | ≈ 0.7782 | approx |
| 7 | ≈ 0.8451 | approx |
| 8 | ≈ 0.9031 | approx |
| 9 | ≈ 0.9542 | approx |
| 10 | 1 | exact |
| 100 | 2 | exact |
| 1,000 | 3 | exact |