Find the value of "?" in the ball picture Riddle below:

What has one letter and starts with an E?

What always comes into a house through the keyhole?

What's the best place to go shopping in the ocean?

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

How do you go from 98 to 720 using just one letter?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?