The Observatory Lens Case
Four padded cases sit beneath an observatory workbench. One contains a newly polished lens needed for tonight’s viewing session. The labels show a moon, star, comet, and planet, but the technician must use the handling notes rather than open every case.
Your task
Which case contains the polished lens?
- 1
The lens case has a metal latch, but not a silver one.
- 2
The comet case contains cleaning cloths.
- 3
The planet case contains a calibration ring.
- 4
The only brass latch is on the star case.
Solution revealed
Solution
The answer: Star case
The comet and planet cases contain other equipment. The moon case has a silver latch, but the lens is not in a silver-latched case. The star case has the only brass latch and is the only case that satisfies every clue, so it contains the polished lens.
Read the complete solution reasoning (spoiler)
Why this answer is the only fit
Star case is correct.
The comet and planet cases contain other equipment. The moon case has a silver latch, but the lens is not in a silver-latched case. The star case has the only brass latch and is the only case that satisfies every clue, so it contains the polished lens.
Original RankDaily puzzle · Manually reviewed · Last updated 20 7 月, 2026