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!!!

Can you tell a 3D object that has just two surfaces?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Sweet & very intelligent katty has 8 puppets(Jane Bird Barbie Angel Colleen Nora Lass Missy).
All puppets are of different size. She arrange all puppets to face towards the guest and tell the guess the following clues :

* Jane has three puppets bigger on its left side
* Bird has two puppets smaller on its left side
* Barbie has one puppet bigger on its right side
* Angel has two puppets smaller on its right side
* Colleen has one puppet bigger on its left side
* Nora has one puppet smaller on its left side
* Lass has four puppets bigger on its right side
* Missy has three puppets smaller on its right side

Also some puppets are inside the bigger puppets.

Assuming you are the guest , can you tell the katty how the puppets are arranged ?

Name a key which is hardest to turn.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

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

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

What word is represented by this rebus?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?