Riddles, one at a time
Two Jugs: 3 L and 5 L
Filling, emptying or pouring a jug counts as 1 move each. Fewest moves to get exactly 4 L in the 5 L jug?
Start by filling the big jug.
6 moves
Fill 5, pour into 3, empty 3, pour the 2 L into 3, fill 5, top up 3: 4 L stay in 5.
Fewest Tokens: Pay 14
Which tokens pay 14 with the fewest tokens?
Biggest first is not always fewest. Try every pair.
7 + 7
Just 2 tokens. Biggest first, 10 + 1 + 1 + 1 + 1, needs 5.
Crack the Lock
Which 3-digit code opens the lock?
738
3 sits in the middle, 8 stays last, 7 goes first.
Which Ring? Even and Big
D
64 is even AND more than 50. 38 is too small; 47 and 75 are odd.
The Stone Garden
Which gate leads to the fountain?
GATE C
Every other gate is sealed off by a stone wall.
Inside the Loop: The Winding Wall
Which gem is INSIDE the loop?
Count wall crossings on the way to the edge: odd means inside.
C
Gem C is inside; A, B and D sit in pockets that open to the outside.