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Science quiz

Tic tac trivia: science true or false

Each board has nine statements, some true and some false. Exactly one row, column or diagonal is three true statements. Find that line.

Format
Tic tac trivia
Items
6 boards
Limit
4:00
Level
Medium
Checked
2026.10.03

Every board is played. Today's first run is the same for everyone.

Boards
6 of 12, drawn fresh each run
Time limit
4:00, stopped while you read the answers
A wrong line
Is marked and explained; the run goes on
  • Each board has nine statements. Exactly one row, column or diagonal is three true statements: find it.
  • Tap three squares, or one of the line buttons under the board, then lock the line in.
  • The T and F buttons are private notes. They never score.
  • Keyboard: 1 to 9 pick squares, the arrow keys move, T and F note the focused square, L locks in.
  • Pause whenever you like (Esc). The board hides while the clock is stopped.

Pick the one line of three true statements. The first board appears when you start.

About this quiz

A run is six boards drawn from a pool of 12, covering the elements, the planets and their moons, minerals, geological time, units, formulas and the body. You do not need to know all nine statements: two sure falsehoods can rule out most of the eight lines.

  • Every board has exactly one winning line. No board has two, and none has zero.
  • Each board is turned or flipped at random when it is dealt, so the winning line is never in a remembered place.
  • After you lock a line in, all nine statements are marked true or false, and each false one comes with what is true.
  • The T and F buttons under each square are private notes. They never count for or against you.

Sources

  1. [1]PubChem, National Institutes of Health. Periodic Table of Elements.
  2. [2]NASA. Planetary Fact Sheet (metric).
  3. [3]NASA Jet Propulsion Laboratory. Planetary Physical Parameters.
  4. [4]U.S. National Park Service. Mohs Hardness Scale.
  5. [5]NASA. Jupiter moons.
  6. [6]NASA. Saturn moons.
  7. [7]NASA. Uranus moons.
  8. [8]NASA. Neptune moons.
  9. [9]NASA. Moons of our solar system.
  10. [10]PubChem, National Institutes of Health. PubChem compound database.
  11. [11]U.S. National Library of Medicine. Medical Subject Headings: Cranial Nerves.
  12. [12]National Cancer Institute, SEER Training. The peripheral nervous system.
  13. [13]National Institute of Standards and Technology. SP 330: The International System of Units, section 2.
  14. [14]BIPM. The SI.
  15. [15]BIPM. SI base units.
  16. [16]BIPM. SI prefixes.
  17. [17]National Institute of Standards and Technology. Prefixes for binary multiples.
  18. [18]MedlinePlus, U.S. National Library of Medicine. Vitamins.
  19. [19]MedlinePlus, U.S. National Library of Medicine. Vitamin A.
  20. [20]MedlinePlus, U.S. National Library of Medicine. Vitamin D.
  21. [21]MedlinePlus, U.S. National Library of Medicine. Vitamin K.

Last checked October 3, 2026

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