Which number should the minute hand point to on the bottom clock?

Concept: In a clock-hand pattern puzzle, each clock shows an hour hand and a minute hand pointing to specific numbers; the pattern connecting several such clocks is usually the arithmetic difference between the number the hour hand points to and the number the minute hand points to, and this difference typically increases by a fixed step from one clock to the next in a stated direction (here, clockwise).

Application: Reading the four clocks clockwise starting from the top clock and finding the hour-hand value minus the minute-hand value for each:

The differences form the increasing sequence 3, 4, 5, 6 — one more than the previous clock each time. For the bottom clock, hour hand = 9 and the required difference (following 3, 4 before it) is 5, so minute hand = 9 − 5 = 4.

Cross-check: Substituting minute hand = 4 keeps the full sequence of differences as 3, 4, 5, 6 — a clean arithmetic progression increasing by 1 at each clock — confirming no other option preserves this pattern from the top clock through to the left clock.