80 in 8

Ready?

80 mental-math questions in 8:00. Mixed integers, decimals, fractions, missing operands.

8 minutes is a real grind — you will make mistakes; keep moving anyway. Pacing is the whole game.

• Score: +1 correct, −1 wrong, −0.5 skipped.
• Pace: 10 per minute. Anything slower and the time pressure becomes brutal in the second half.
• Five-second rule: If a question stalls you for >5 seconds, skip it. Sunk-cost fallacy is the #1 killer of an 80-in-8 score.
• Hold focus through the dip: Most people lose 30 seconds around minute 4 to a hard streak. Recognise it and push through.
• Format: Fractions like 7/16, decimals like 0.087. Enter submits, right answer auto-advances.