Riddles, one at a time
Hands Apart: 9:45
What is the SMALLER angle between the hands?
The hour hand moves 30° each hour. How far has it gone after 45 minutes?
Video · Genius
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22.5°
The minute hand is on 9; the hour hand is 3/4 of the way to 10: 3/4 × 30° = 22.5°.
What Am I? Ribs but No Bones
Video · Easy
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Umbrella
It opens in the rain, closes after, and has ribs: C.
Split 8 Litres
Fewest pours to share it 4 L and 4 L?
Only the 8 L and 5 L jugs can end with 4 L. Use the 3 L jug as a measure.
Video · Genius
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7 pours
8→5, 5→3, 3→8, 5→3, 8→5, 5→3, 3→8: 4 L and 4 L.
Shape Sudoku
Which of the six shapes fits the ? cell?
Start with the box that has the most shapes.
Picture · Expert
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DIAMOND
Solve the whole grid: only a diamond fits there.
Fewest Tokens: Pay 24
Which tokens pay 24 with the fewest tokens?
Biggest first is not always fewest. A token can be used many times.
Video · Genius
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6 + 6 + 6 + 6
Just 4 tokens. Biggest first, 15 + 6 + 1 + 1 + 1, needs 5.