Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

What begins with T, ends with T, and has T in it?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

If an electric train is travelling south, then which way is the smoke going?

What Time Should the last watch show in the below figure?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?