Today's PUZZLE CLASSIC OF THE DAY

Draw a straight line which would cross out a series of cells with the highest total of numbers in them. Start by pressing and dragging from any cell.

Place digits 1-9 into this simple cross so that the total in the row is the same as in the column. Reach the highest possible sum.

Each square in the grid measures 1 unit by 1 unit. What is the area of the orange triangle in square units?

One sunny day a diesel ship leaves on a long voyage. When it is 180 miles from shore, a seaplane, whose speed is ten times that of the ship, is sent to deliver mail. How far from shore does the seaplane catch up with the ship?

How many equilateral triangles can you spot on this ancient stone? The big one is counted.

How many squares are on a chessboard? One is 8x8.

A teacher has 2 children. The older is a boy. What is the probability that both children are boys?

An artist has 2 children. They aren't both boys. What is the probability that both children are girls?

Place the numbers 1 through 12 in the circles of this six-pointed star so that the sum of the numbers in each of the six rows is 26. Hint: 1 & 12 - on the same line.

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

This two-cube calendar numerically represents every day in a month. What are the four digits that are hidden from the view on the left cube, and the three on the right one?

Suppose you have a broken 12-hour digital clock that has its display turned on only when the number of hours is the same as the number of minutes - 08:08, 09:09, 10:10, and so on. What is the minimum time interval between such two “neighboring“ turnings?