Riddles, one at a time
Glass Overlay: Shared Lines
Which card completes the grid?
Keep only the lines that appear on both of the first two cards.
A
In each row, only lines on both cards stay. Row 3 gives card A.
Nine Glass Lanterns
Which ONE tap lights all nine tiles?
Which tile's tap covers exactly the dark tiles?
D
Tapping D flips A, D, G and E: all nine shine.
Tangled Cords
Which switch lights the star lantern?
SWITCH C
Follow cord C over and under: it ends at the star.
Square, Circle, X
How many closed areas can you count?
Each corner outside the circle is split by a diagonal.
12
4 slices inside the circle, and each corner is cut in two: 4 + 8 = 12.
Turn, Flip, Turn
Which card do you get?
Mark one corner of the card and follow it through each step.
A
Turn, flip top-bottom, turn: the same as one top-bottom flip. A.
Two Candles: Twice as Tall
Two candles of the same height are lit together and burn at a steady rate. A lasts 4 hours, B lasts 6 hours. After how many hours is B twice as tall as A?
A loses a quarter of its height each hour, B loses a sixth.
3 hours
After 3 h, A has 1/4 left and B has 1/2 left: twice.