Today's PUZZLE CLASSIC OF THE DAY
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Bird Whistle: 2 Congruent Parts

Cut this figure into 2 congruent parts (identical in area and shape, though they can be mirrored).
From London to Tipperary

Straight lines represent the passages from town to town. It is easy to get from London to Tipperary in odd number of passages - 3, 5, 7, 9, and so on. But can you find a route with EVEN number of passages, though less than 20?
Cherry Volumes: Pit & Pulp
The cherry pulp surrounds its pit with a layer as thick as the pit. Assuming the cherry and the pit are shaped more like spheres, how much bigger the volume of the cherry's juicy part is compared to the volume of the pit?
TriCounting: House

How many triangles are in this figure? Select a triangle and click the "Count" button.
TriCounting: 5 Crossing Lines

How many triangles are in this figure? Select a triangle and click the "Count" button.
Triangular Frame into 3 Congruent Parts

Cut this figure into 3 congruent parts (identical in area and shape) so that each of them includes a diamond.
Train Set Bonanza

Sam has never felt happier around his Birthday time. Dad just bought him 20 cars for his toy train set, spending $20 because they were on sale. There were locomotives ($4 each), passenger cars ($50 each), and freight cars ($25 each). Can you figure out the exact numbers of each type of car Sam got?
3 Numbers: x, 2x, 3x

Place digits 1 through 9 in three rows in order to get three 3-digits numbers, so that the 2nd row number is twice bigger than the top one, and the bottom row number - thrice bigger than the top one.
5, 11, 23... Fill the Gap

What number should go instead of the question mark to complete the sequence?
Four 7's to make 100

It is possible to get 100 by placing two arithmetic signs somewhere between these four sevens. What are the signs and where they should go?
TriCounting: Sectioned Trapezium

How many triangles are in this figure? Select a triangle and click the "Count" button.
TriCounting: Rectangle in Triangle

How many triangles are in this figure? Select a triangle and click the "Count" button.