What is the next number in this matchsticks series riddle?

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!

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Buy me, smell me or deliver me, I do not change.

Who am I?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?