What four weights can be used to balance from 1 to 30 pounds?

Considering the below equation:

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

Then, I + II + III = ?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

What goes through cities and fields, but never moves?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

The cream is heavier than Milk. True or False?

Our product and our sum always give the same answer. Who are we?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.