I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

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!

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

How can you tell a raw egg from a hard-boiled egg?

What brings you down but never up?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?