Which is the smallest number that you can write using all the vowels exactly once?

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!

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

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 fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

who is silent in the parliament?

I always drive my customer away.

Who am I?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?