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!

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You can hear me, but you can't touch or see me.

What am I?

I am sure no one can have two things for dinner. what are they?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Who always enjoys poor health?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?