Question

if u tell these 3 brain test question then u are smart 1) which is heavier 1kg of cotton or 1kg of iron. 2) which word is spelled wrong in an English dictionary. 3) name an invention that helps u to see behind a wall.​

Answer 1

I just only knew the 1st one they both are equal

Answer 2

Answer:

the answer of 1st one is, they both will be equal

2nd, the answer is wrong

3rd, the answer is window

thanks pls mark as brainliest