Today's PUZZLE CLASSIC OF THE DAY

After the field trip to a science museum, two schoolgirls were riding the light rail train back from the downtown to their suburb station. “I notice,“ one of the girls said, “the incoming trains, coming in the opposite direction, pass us every 5 minutes. What do you think - how many trains arrive in downtown from our suburb in an hour, given equal speeds in both directions?“ “12, of course!“ the other girl replied, “because 60 divided by 5 equals 12.“ The first girl did not agree. What do you think, is it 12 trains an hour or a different number?

Can you discover a perfect five-pointed star in this pattern? Highlight all respective patches to reveal the star.

Divide this shape of a stylized Sphynx into 4 smaller congruent parts, all of which are similar to this big one. Congruent parts can be mirrored.

Digits in the left column add up to a different total than the digits in the right column. Swap just 2 cards to make the two columns adding up to the same total.

A regular hexagon circumscribes a circle, which circumscribes another regular hexagon. The inner hexagon has an area of 3 square units. What is the area of the outer hexagon?

Divide this trapezium into 4 smaller congruent parts, all of which are similar to this big one.

A hundred bundles of hay were prepared to feed 100 buffaloes. - A young standing buffalo eats 5 bundles. - A young buffalo lying down eats 3 bundles. - Three old buffaloes eat 1 bundle together. How many buffaloes of each kind are there?

A half-ready 4x7 fuse board has 4 square apertures in it. Cut it into 4 identical panels (in area and shape), each with one aperture in it.

A horse travels half his route, with no load, at 12 miles per hour. The rest of the way a load slows the horse to 4 miles per hour. What is the horse's average speed?

Cut this L-shaped board into 4 congruent parts (identical in area and shape, though they can be mirrored), which all are scaled versions of the board (similar).

Divide the watch face with 2 straight lines into 3 parts so that the sums of the numbers in each part are equal. Draw by moving between red notches on the inner circumference.

Place digits 1 through 9 into the equation so that to get the sum of 99,999.