Find the next number in the series.
1 10 24 43 67 ?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Can you start the fire using two pieces of wood?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

Take one out and scratch my head, I am now black but once was red. What am I?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

Why do we preferably have round manhole covers and not square ones?