Can you fill the blank with the correct number?

6 30 870 756030 _____

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Can you spot the hidden girl in the picture below?

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?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

What is the fastest way to double your money?

Find the missing number in the image below.

How can you take 2 from 5 and leave 4?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?