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

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What has no start, end, or centre?

What do you think with the below Picture ?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

On a windy rainy night , I was driving in my car.
When i reach the bus stand , i see three people waiting for the bus.

1. An old lady who needs an immediate medical attention
2. My Best Friend
3. Girl whom i love from childhood

My car is a two seat, so can you tell me , what i have done in this situation ?

Solve the following series:
AZ, GT, MN, __, YB

How can you make number one disappear by adding something to it?

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?

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?