Today's PUZZLE CLASSIC OF THE DAY

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

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?

Solve this famous Sam Loyd's Puzzle: 1 Top + 3 Cubes = 12 Marbles. 1 Top = 1 Cube + 8 Marbles. 1 Top = How many Marbles?

Cut this figure into 2 congruent parts (identical in area and shape).

There are 200 houses on a street, distributed evenly between its two sides - a hundred on each side, odd-numbered stating from 1, and even-numbered starting from 2. Which sum is bigger - of all odd or of all even numbers? What is the sums’ difference?

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

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

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

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

If two days ago was the day preceding Tuesday, what day will be the day after tomorrow?

A married woman states: "My husband's age is a two-digit number, which, when digits are swapped, gives my age. He is older than me and our age difference is 1/11th of our ages' sum." How old are the spouses?

Using some arithmetic operations, convert four 5's into 16.