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30 September 2026 / CASE FILE 088Easy

The moon that fitted

Three parcels left the gallery, but only one could carry its little moon.

3 min100 points

The exhibition’s favourite piece is a blue glass sphere that seems to hold a moon inside. This morning it vanished. During the shift change, three people left with a closed container.

The courier has already collected the parcels. The gallery kept photographs and measurements of the containers. Before stopping the right shipment, you must work out where the intact sphere could be travelling.

What we know for certain

One of these three people carried the whole sphere out inside their only container. There were no accomplices, extra containers or alterations. The sphere and containers are rigid. Measurements and observations are reliable; statements may be lies.

L

Lucía Navas

Window-display designer
A
«My box held colour samples. I closed it with its usual lid.»
Ó

Óscar Vidal

Catalogue photographer
B
«I only sent some prints in my flat case.»
M

Mara Seguí

Ceramic restorer
C
«My jar is the largest, but it held nothing from the exhibition.»

Opening these five clues does not cost points.

01An indivisible sphere

The piece is a solid sphere measuring nine centimetres in diameter. It cannot be folded, dismantled or compressed.

02Lucía’s box

Its internal width, depth and height are all eleven centimetres. Removing the lid leaves a square opening measuring eleven by eleven centimetres.

03Óscar’s case

It measures twenty by fourteen centimetres, but its internal height is only three centimetres. It is rigid and stayed closed without bulging.

04Mara’s jar

Its interior measures fifteen centimetres in diameter and twenty in height. However, its only opening is eight centimetres in diameter and cannot be widened.

05No other way out

Everyone left with their hands visible, no bags and just one container. None of the containers was broken or altered.

BEFORE OPENING THE ENVELOPE

Read the solution?

The case will be marked as revealed, with zero points. It will not count as a win or add a day to your streak.

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