What kind of storm is always in a rush?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside.
The man said, "Oh! I am really sorry, I thought this was my room."
He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man.
What made her suspicious of that man? He might have been genuinely mistaken.

Replace the question mark in the picture below.

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Complete the table series riddle by finding the number that can replace "??".

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

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?