Spot what is wrong here in below Picture?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

what does the below rebus means?

How many sides does a circle have?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

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

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

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?