What seven-letter word has hundreds of letters in it?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Solve the counting riddle by identifying the number of triangles in the given picture.

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Decode below rebus
D
N
A
T
S , D

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?