You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

What can you catch but never throw?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What does below Rebus say?

XLR8

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?