A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Count the number of triangles in the given picture.

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Can you find the missing piece of the Porsche?

A man dies of old age on his 25 birthday. How is this possible?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Solve the counting riddle by identifying the number of triangles in the given picture.

What do you call a fish without an eye?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

You see me once in June, twice in November, and not at all in May. What am I?