How is the combined angle error calculated?

The game sums the absolute degree error of the hour hand and the minute hand. Each is scored independently, then added together.

What total error is a top score?

Under 5° combined is excellent. Under 10° is solid. The minute hand is usually more accurate than the hour hand because its scale is more familiar.

Does dragging from the center control which hand?

The hour hand is controlled by dragging near the center stub; the minute hand by dragging near the longer outer hand. The UI cues guide which is which.

Can You Set the Clock?

Can you set the clock to the exact time by placing the hands correctly? A time is shown in text and you drag the clock hands to match it. Your score is the combined angular error of both hands. It sounds like pure recall — but converting "10:37" into angular positions requires multiplying time by degrees-per-unit on two different scales simultaneously, and most people get one or both hands systematically wrong.

How to Play

A time is displayed in text (e.g., "10:37").
Drag the hour hand and minute hand to the correct positions on the clock face.
Hit Submit — your angular error for each hand is shown.
Remember: the hour hand moves between hours as the minute hand progresses.

Why It's Hard

The minute hand requires placing 37 minutes as 222° (6° per minute × 37). The hour hand at 10:37 isn't at the 10 — it's 37/60 of the way from 10 to 11, adding another ~18.5° to its position. Most people ignore the hour hand's inter-hour progression and lock it to the nearest hour, introducing up to 30° of systematic error on the hour hand alone.

Tips

1Minute hand first: 37 minutes = 37 × 6° = 222° clockwise from 12.
2Hour hand: place it between the hour number and the next, proportional to how many minutes have passed.
3Times like X:00, X:15, X:30, X:45 are easiest — the hands land on familiar quarter markers.

FAQ

How is the combined angle error calculated?: The game sums the absolute degree error of the hour hand and the minute hand. Each is scored independently, then added together.
What total error is a top score?: Under 5° combined is excellent. Under 10° is solid. The minute hand is usually more accurate than the hour hand because its scale is more familiar.
Does dragging from the center control which hand?: The hour hand is controlled by dragging near the center stub; the minute hand by dragging near the longer outer hand. The UI cues guide which is which.

Built by

Ethan R. Caldwell

Game Developer · Wilmington, DE

Designed Can You Set the Clock? and 46 other browser puzzles. Game developer based in Wilmington, Delaware. Hardcore puzzle gamer at heart — obsessed with logic puzzles, sokoban-style mechanics, and physics-based brain teasers. Off the clock, unwinds with ARPGs, RPGs and JRPGs.

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