What is common among 11, 69, and 88?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

What question can you never answer yes to?

Why despite killing dozens of people Charley and Wilma were not punished?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.