Can you replace the question mark with the correct number?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

Which word does the below Plexor means ?

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

Buy me, smell me or deliver me, I do not change.

Who am I?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

What will you call your mother's brother's brother-in-law?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.