1. Carlo has 12 ballpens and dino has 18 ballpens. each of them will share the ball pens to their friends. what is the greatest number of ball pens each of their friends get if carlo and dino will give the same number of ball pens?

2. the pupils of the Dupag elementary school collected use plastic bottles for recycling . they arranged the bottles in boxes 5 and 6. what is the least number of bottles that pupils gathered in all ?​