What is the longest word in the dictionary?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

Can you solve the maths in the below-given picture equation?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Can you find the key in the picture below?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Which Travels Faster? Solve below famous picture riddle:

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?