What is the fastest way to double your money?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

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

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

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

When can we add 2 to 11 and get 1 as the correct answer?