Which word does the below Plexor means ?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?