Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you solve below mathematical equation?

2^1234 - 2^1233

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.

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

Can you Find and name the hidden bird in the picture below ?