What does does this rebus picture means ?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Find the 8 in the below-given Image.

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10