Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

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

How many triangles can you find in this given picture?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

If you say my name, I will no longer exist. What am I?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What time is it when an elephant sits on a fence?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

What goes up but never comes down?