By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Prove that the below maths equation is true.

8 + 8 = 91

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

On a beautiful Sunday morning, You ordered a hot tea to your hotel room and suddenly you remember an important thing that needed to be done right now will take around 3 minutes to complete.
Like most people you like your tea to be hot while drinking so, when should you pour cream in the tea?
1. straight away
2. Just people, you drink the team
3. Its does not matter

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

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Can you decipher the below rebus?

PBLUESAISNUERSES

Why Aeroplane windows are round?