What work can one never finish?

How many triangles do you see in the picture puzzle below?

What happened when the wheel was invented?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

When does a USA Potato change its nationality?

The dirtier I get, the whiter I look. Who am I?

Here is a Swiss Cross. You have to make two straight cuts in the figure so that it is divided into four congruent pieces. Also, you should be able to join these pieces into a square then. Can you accept this challenge?

What can jump higher than a building?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?