Can you solve the below algebraic mathematical equation?

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

What word is pronounced the same if you take away four of its five letters?

how come the second man dies?

The doctor prescribed you to take one pill from the bottle every half an hour. The bottle is now left with only three pills.

How long do you think you have before you run out of pills?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Which alphabet letter is a question?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?