What is common among 11, 69, and 88?

One of the leprechaun is missing if you see the two pictures attached to this question. Where did he go? When he comes back, do you know where has he been?

What is the end of everything?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

What occurs twice in a week, once in a year but never in a day?

Can you find any error in the following sentence?

A taxi was standing outside a fort at night. A man came out of the fort, opened the gate and hit the taxi driver killing him instantly. He took all the money out of the meter and started running till he was caught by a local sheriff.

If,

Akriti = 631
Levis = 521
Sroti = 521
Aneel = 533
Then,
Sunil =?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.