A man dies of old age on his 25 birthday. How is this possible?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

If Rajina's daughter is my daughter's mom, who am I to Rajina?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

Why did the Girl throw the butter out of the window?

Can it be possible to build a house that has all its four walls facing towards the South?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?