Riddles, one at a time
Robot Program: U-Turn
Straight: 1 tile forward, the way it faces. Curved: turn on the spot. U: turn around. Which tile does it stop on?
Turns use the robot's own left and right, and a turn does not move it.
D
Right 2, down 2, back up 1, then left 1: tile D.
Inside the Loop: Four Gems
Which gem is INSIDE the loop?
Trace a straight line from a gem to the edge and count the walls.
A
A line from A to the edge crosses the wall once (odd): A is inside. B, C and D reach the edge without crossing.
Sun Gate to Moon Gate
Fewest days from sun to moon?
13 DAYS
Two oases then a tower: 3 + 5 + 2 + 3 = 13.
What Am I? The Grey Trail
Which object fits all three clues?
Think about the colour of the mark each one leaves.
Pencil
It gets shorter as it works, leaves a grey trail and has lead inside: B.
Mirror Clock: The Long Wait
4 hours 11 minutes
16:61, 17:71, 18:81 and 19:91 are not real times. The next is 20:02, 4 h 11 min after 15:51.