Today's PUZZLE CLASSIC OF THE DAY
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Move One Digit - Get It Right
Moving just one digit to a new position makes this equation correct. Which digit and where must be moved?
Mallet: 3 Congruent Parts
Cut this figure into 3 congruent parts (identical in area and shape, though they can be mirrored).
TriCounting: Mirrored Trapeziums
How many triangles are in this figure? Select a triangle and click the "Count" button.
TriCounting: K-lines in Rhombus
How many triangles are in this figure? Select a triangle and click the "Count" button.
Five 3s to 37
Using 2 arithmetic signs and/or brackets, can you get 37 out of the five 3s?
9 Minutes with Two Hourglasses
Using 4-min and 7-min hourglasses, measure out exactly 9 minutes. Can you recreate the chain of their turns after both hourglasses are simultaneously started?
Confetti: 2 Congruent Parts
Cut this figure into 2 congruent parts (identical in area and shape).
Spinning Top: 2 Congruent Parts
Cut this figure into 2 congruent parts (identical in area and shape, though they can be mirrored).
TriCounting: 4-Pointed Star
How many triangles are in this figure? Select a triangle and click the "Count" button.
TriCounting: Triangular Pyramid
How many triangles are in this figure? Select a triangle and click the "Count" button.
Two Ropes
Suppose, you have 2 lengths of rope, knowing each of them will take exactly 1h to burn. They say it's possible to burn the ropes to measure exactly 45 mins, with no timepieces and without doing any cuts to the ropes. For how long to burn them simultaneously to complete the task?
Puzzling Scales
Solve this famous Sam Loyd's Puzzle: 1 Top + 3 Cubes = 12 Marbles. 1 Top = 1 Cube + 8 Marbles. 1 Top = How many Marbles?