Riddles, one at a time
Inside the Loop: Only One Is In
Which gem is INSIDE the loop?
Count wall crossings on the way to the edge: odd means inside.
Video · Medium
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A
A line from gem A to the edge crosses the wall an odd number of times; from B, C or D, an even number.
Word Ladder: Ship to Slow
Video · Medium
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SHOW
SHOP to SHOW changes P to W; SHOW to SNOW changes H to N.
Glass Overlay: Slide and Cancel
Which card completes the grid?
Lines that appear on both cards disappear; all the other lines stay.
Video · Hard
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B
In each row, lines on both cards cancel and the rest stay. Row 3 gives card B.
Join the Dots
Join 3, 6, 9... in order. What appears?
Video · Easy
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C LANTERN
3 to 45 traces a lantern; the rest are decoys.
Longest Roman Year
Which year needs the MOST Roman letters?
Some digits need many letters: 8 is VIII, but 9 is just IX.
Video · Hard
Challenge link
1888
1888 = MDCCCLXXXVIII: 13 letters. 1777 needs 10.
Lemon, Tea and Dates
Picture · Medium
Challenge link
25
Lemon 10, cup 5, date 2. Multiply first: 5 + 20 = 25.