Can you find a five letter word that is left with only two letters if one is removed?

Prove that the below maths equation is true.

8 + 8 = 91

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

Before Mount Everest was discovered, what was the highest mountain in the world?

Can you find out the remainder when 3^300 is divided by 5?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Can you find the dog hidden in a group of pandas?

What is the riddle which can be asked all day with a different correct answer each time.