A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Name a key which is hardest to turn.

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

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Our product and our sum always give the same answer. Who are we?

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 speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

John was drowned by he was not wet. How?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?