Little J.J. started to learn math and likes to play with big brother A.J. on math games.

One day, while they are both in bath tube and covered with bubbles, a new game started.

"How old was you when I was just a baby, A.J. ?" J.J. asked.

"I was three when you were born" A.J. answered.

"I will be five in Sep, so you will be eight then" J.J. figured.

"Yes, when you are 10, and I will be 13, I will be always ahead of you" A.J. said proudly.

"Ok, How old will you be when I am 100 ?" J.J. asked.

"That is easy, I will be 103" A.J. thought about it for a second and laughed,

"Then we will be really old brothers "

Ok, old brothers, time to get out of bath tub.