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Equation Detective Puzzle

Equation Detective – Level 1 – Hard

Other Puzzles

In a school lab investigation, match each student to their experiment station, the time slot they worked, and the piece of equipment they used.

Clues:
• It isn’t true that Robert didn’t use the Microscope with the Station B.
• It isn’t true that Dylan didn’t use the Digital scale with the Station A.
• The person at the 09:45 used the Thermometer.
• The Station D was scheduled at the 10:00.
• Station D was scheduled earlier than Station A.
• Miguel did not work on the Station C.
• The Microscope was not used with the Station A.
• Station C was scheduled later than Station B.
• Station A was scheduled earlier than Station C.
• Station D was scheduled earlier than Station C.

Your Workings For Equation Detective

Enter your working out in this box, including your suggested solution.
Your Answers:
Name Time Slot Lab Station Equipment Used
Robert
Miguel
Dylan
Kenneth

Reveal the Answer

Reveal Answer
Additional instructions for Equation Detective (Level 1, Hard)

Equation Detective – Hard

Don’t rush the “hard clues”. The official method is to leave them until you’ve built enough structure. That’s exactly what makes Hard manageable.

Recommended routine:

  • Complete as much of the grid as possible using easy positives + elimination.
  • Only then tackle multi-part clues (those referencing several people/items/days/prices at once).
  • Convert multi-part clues into smaller pieces (one constraint per line) and apply them one at a time.

Pro tip: if you’re unsure between two options, mark them lightly and see which one creates a contradiction when you apply the next clue.

Full help: Equation Detective

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