When 99 is considered higher than 100?

They are three errirs in this question. Can you find them?

What always comes into a house through the keyhole?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

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!

Forwards I am heavy, backward I am not. What am I?

Replace the question mark in the picture below.

Why is 6 afraid of 7?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?