What time is it when an elephant sits on a fence?

I cannot talk, but I always reply when spoken to. What am I?

What kind of tree can you carry in your hand?

Why is 6 afraid of 7?

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

Which letter of the alphabet has the most water?

Who is that with a neck and no head, two arms and no hands? What is it?

A California farmer owns a beautiful pear tree. He supplies the fruit to a nearby grocery store. The store owner calls the farmer to see how much fruit is available for him to buy. The farmer knows the main trunk has 24 branches. Each branch has exactly 12 boughs and each bough has exactly 6 twigs. Since each twig bears one piece of fruit, how many plums will the farmer be able to deliver?

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.

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.