Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

If,

1 = 5 ,
2 = 25 ,
3 = 325 ,
4 = 4325

Then, 5 = ?

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

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

At a Society election for president, precisely 963 votes were cast.
There is a total of 4 candidates that participate in the election.

The winning candidate exceeds the opponents by 53, 79 and 105 votes.

How many votes do each candidate gets?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?