In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

What's a single-digit number with no value?

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?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

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

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

You need to move three matchsticks to form three squares. Can you do it?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?