What is the below Rebus indicate?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

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

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?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?