Riddles, one at a time
Follow the Light
Colours mix like paint. Which door does the beam light, and in what colour?
D, ORANGE
Mirrors turn it; red and yellow panes make orange.
Two Candles: 20 cm and 15 cm
After how many hours are they the same height?
How big is the gap at the start, and how fast does it close?
2 hours
After 2 h: A is 20 − 8 = 12 cm, B is 15 − 3 = 12 cm.
Turn the Crank
The big gear turns clockwise. Which lantern goes UP?
LANTERN C
Each mesh and the crossed belt flip the spin.
Flip-Flop Gates
Gates start as shown and flip after each box. Where does box 3 land?
BIN C
After boxes 1 and 2, box 3 goes left, right, right.
Shape Sudoku
Which of the six shapes fits the ? cell?
Start with the box that has the most shapes.
DIAMOND
Solve the whole grid: only a diamond fits there.
Lamp Code: Deduce the Lamps
What number does the last row show?
Compare the rows showing 3 and 5: they share one lamp.
14
Lamps worth 8, 4, 2, 1 fit every row: 2 + 1 = 3, 4 + 1 = 5, 8 + 1 = 9, 4 + 2 = 6. So 8 + 4 + 2 = 14.