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?

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

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

What always comes into a house through the keyhole?

Can you count the number of squares in the given picture?

Which is the smallest number that you can write using all the vowels exactly once?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?