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

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

The more of this there is, the less you see. What is it?

Why 1729 is a magic number? Answer Logically.

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

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

How many times do a clock's hands overlap in a day ?