Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

what's the probability of getting a king or a queen from a pack of 52 cards?

Take one out and scratch my head, I am now black but once was red. What am I?

Can you start the fire using two pieces of wood?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

I travel all around the world but always stay in the corner. What am I?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?