Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

Can you name an animal whose killing cannot be performed without spilling your own blood?

A bomb exploded in a room full of married couples and no one died. How?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Which is heavier: a ton of bricks or a ton of feathers?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?