What is common among 11, 69, and 88?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

Can you find a five letter word that is left with only two letters if one is removed?

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 ?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.