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!!!

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Name a key which is hardest to turn.

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

what does the below rebus mean?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

Why 1729 is a magic number? Answer Logically.