what does the below math rebus puzzle mean?

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

What is at the end of a rainbow?

How can you leave a room with two legs and return with six legs?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?