I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

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

Can you find the company name in the pictogram below?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

How many sides does a circle have?

What is the centre of gravity?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?