Mr. Buttons was all set to go to the village of Buttonland to meet his friend. So, he packed his bags and left for the village at 5 in the morning. Upon travelling on a road for miles, he came across a point where the road diverged into two. He was confused on which road to take. He gazed around and he saw two owls sitting on a branch. He thought he could ask for directions for the village from the two owls. So he went to the tree. There he saw a sign which read, "One owl always lies, and one is always truthful. They both fly away if you ask them more than 1 question."
Mr. Buttons was caught in the dilemma of what to ask? And from which owl to ask, since he only had one question. What should Mr. Buttons ask?

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

If a wheel has 54 spokes, how many spaces are there between the spokes?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

How many times can you subtract the number 5 from 25?

There is something which you can be arrested for attempting but not for successfully completing.

What two things can you never eat for breakfast?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?