With the help clues provided in the image, can you find the 5 digit key?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Count the Triangle in the figure given below:

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Can you place three balls such that the equation shown in the picture holds true?