There are three perfect squares in a standard die; 1, 2, 4. If there is two standard dies, then the probability of getting a perfect square is 1/3 x 1/3 = 1/9.
There are 4 numbers less than 5 in a standard die, making it 1/4 x 1/4=1/16.
The answer is 2 atm. I guessed on the problem and got it right. I don’t know the work though.
Clouds I believe because hydro means water and clouds are made of water