It is always ahead of me yet I can never see it. What is it?

Can you find out the number that should replace the question mark with a valid reason?

What's the only room from which no one can enter or leave

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

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

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

You are trapped into a death trap by the famous jigsaw killer. As usual, a screen flashes in front of you and explains you the trap game. There are 100 pearls kept in a bowl in front of you and an empty bowl. Among the 100 pearls, 50 are white and 50 are black. You can divide them as you like into the two bowls. Once you are done, you will pull a lever, which will turn the room pitch black. The bowls will move and shuffle around. In the dark, you have to pick up one pearl from any bowl. Once you do that, the room will flood with lights again. If the peral you have in your hand is white, you will be allowed to live, but if the pearl you picked is black, the room will be filled with poisonous gas and you will die. How will divide the pearls to increase your chances of survival?