What has a ring but no finger?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Count the number of triangles in the picture below:

Using eight eights and addition only, can you make 1000?

Identify the hidden meaning behind this picture?

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 ?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?