Riddles, one at a time
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.
One Piece Fits
Pieces may turn but never flip over. Which piece fills the hole?
Video · Medium
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PIECE C
Turn C a quarter turn: it drops right in.
Flip, Then Turn
Video · Hard
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B
Flip left-right first, then a quarter turn clockwise: card B.
Old Phone Keys: Biggest Number
Which of the four words types the BIGGEST number?
All four start with 9, so compare the second digit.
Video · Hard
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WORD
WORD types 9673, ahead of WEST 9378, YEAR 9327 and WAVE 9283.
Mirror Odometer: 15951
How many more km until the next mirror number?
The middle digit is already 9, so it cannot go up. What has to change instead?
Video · Medium
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110 km
The next mirror number is 16061: 16061 − 15951 = 110.