I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What 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!

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

What is black when you buy it, red when you use it, and gray when you throw it away?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?