Questions

The earth's atmosphere is composed of 4 layers. 

1. Troposphere

2. Stratosphere

3. Ionosphere

4. Mesosphere

The ozone layer is located in the lower region of the Stratosphere which extends at 11 - 50 kms from the Earth's suface.

From the hints,

Only two options for 1st and 2nd digits => 4,2 and 9,3 since it is single digits

Sum of second and third digit  = 10 

If 2 => 3rd digit = 8

If 3 => 3rd digit = 7

4th digit = 2nd digit + 1 => (2+1 =3) or (3+1 = 4)

Sum of all digits = 30

Let 5th digit be x

=> 1st possibility = 4 + 2 + 8 + 3 + x = 30 => x = 13 (Not possible since it has 2 digits)

=> 2nd possibility = 9 + 3 + 7 + 4 + x = 30 => x = 7

Therefore, the PIN is 93747 

In 1814, George Stephenson developed steam engine to haul coal from mines to ports by railways. In 1830, the first railway train began to carry passengers and freight from Liverpool to Manchester.

The boat which is overtaken must give way to the boat which is overtaking.

Durand Cup is associated with the game of Football.

The Durand Football Tournament or Durand Cup is a football competition in India which was first held in 1888. This competition was named after its founder, Sir Mortimer Durand from Simla.