If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

I have an eye but still cannot see.

Who am I?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

Why do people go to bed?

Find the next number in the series below

21 32 54 87 131 ?

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

Replace the question mark with the correct number in below Picture:

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

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?

Forwards I am heavy, backward I am not. What am I?