Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

Why Aeroplane windows are round?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

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?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Can you write down eight eights so that they add up to one thousand?

It belongs to you, but other people use it more than you do. What is it?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?