Find the missing number in the sequence below:

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?

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

What time is it when an elephant sits on a fence?

Buy me, smell me or deliver me, I do not change.

Who am I?

Prove that the below maths equation is true.

8 + 8 = 91

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Which is the rope you never skip with?

What do you think with the below Picture ?