81 x 9 = 801. What must you do to make the this equation true?

I am the fastest animal but cannot climb the tree. What am I?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

During which month do people sleep the least?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

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

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

What is always in front of you but can’t be seen?

Find the number of squares in the below picture