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

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

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.

What does below chemistry rebus means?

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 ?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

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

The centre of the third figure is empty. What digit should fit inside?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?