How many words can a pen with half refill write?

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!

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What is the next shape from answers A, B, C, and D figure?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Why is it very easy to weigh a fish?

What is the coolest letter in the alphabet?

What is the largest number you can write with just 3 digits?

Why did Navjot Singh Sidhu put the new January calendar in the freezer