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

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Find out the number of circles in the given picture having Illusion

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Solve the puzzle by telling what does below picture means.

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

In the given picture, in how many ways can you read the word "Tiger"?

What kind of storm is always in a rush?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?