Remove two matchsticks to make the below equation correct.

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

How many letters are in the alphabet?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

What has one letter and starts with an E?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

What occurs twice in a week, once in a year but never in a day?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Which Number is the odd one out?

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