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

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

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Replace the question mark with the correct number in below Picture:

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

Find the last number in the series below:

voN luJ yaM raM ---

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.