What is common among 11, 69, and 88?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?