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

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

You can hear me, but you can't touch or see me.

What am I?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

What type of tree can I carry in my hand?