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.

What is next number in the pattern below:

131 517 192 123 ?

What has many keys but can’t open a single lock?

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

What is the centre of gravity?

How many triangles can you find in this given picture?

Name a key which is hardest to turn.

I have an eye but still cannot see.

Who am I?

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

Can you count the number of squares in the figure below?