Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

What's the only room from which no one can enter or leave

Eight of us go fourth, not back, to protect our king from an attack. What are we?

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

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

John is the son of Jacob.
So,
Jacob is the_____of John's father?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

When can we add 2 to 11 and get 1 as the correct answer?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

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