I have eight fingers and two thumbs but I do not live. What Am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Which wheel of car does not rotate when you turn your car right?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

Find the 8 in the below-given Image.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

I have branches, but no fruit, trunk or leaves. What am I?

How many triangles are there on the puzzle below?

What is the next number in this matchsticks series riddle?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?