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Mental Math Quiz #840

#840 · 10 questionsArchive: not ranked
How to play
  • Press Start for the first of ten questions. The clock starts with it and stops at your last answer.
  • Each question is a sum to work out in your head: adding, subtracting, multiplying, dividing or a percentage.
  • Tap an answer, or press 1 to 4 (or A to D) on a keyboard. Answers are final: you see the right one and a one-line explanation, then press Next.
  • Most correct answers ranks first, then the fastest time. Only a member’s first finished quiz of the day counts for the leaderboard.

Mental Math Quiz #840 is the quiz from Tuesday, October 20, 2026 (10 questions). Archive quizzes count toward your statistics, not your streak or the leaderboard.

Archive games count toward your statistics, not your streak or the leaderboards.

About Mental Math Quiz #840

Mental Math Quiz #840 was the quiz for Tuesday, October 20, 2026: 10 questions: 4 easy, 3 medium and 3 hard. Everyone who played Mental Math Quiz that day got the same quiz, and it stays here to play for 60 days.

The questions of Mental Math Quiz #840

  1. What is double 51?
  2. What is double 41?
  3. What is 55 + 7?
  4. What is 79 − 73?
  5. What is 488 − 191?
  6. What is 50% of 500?
  7. What is 88 ÷ 8?
  8. What is 26 × 14?
  9. What is 15% of 200?
  10. What is 9 × 5 − 4?

The answer options and the answers appear only when you play the quiz, one question at a time.

New to Mental Math Quiz? The rules, tips and common questions are on the Mental Math Quiz page, and Mental Math Tricks for the Daily Quizzes goes into strategy.

Other days of Mental Math Quiz

Every day of the last 60 is in the puzzle archive.

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