Can you count the number of quadrilaterals in the picture below?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Which is heavier: a ton of bricks or a ton of feathers?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

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?