Look over this list. After you read each item, see if you can figure out, “Is this number more or less than a billion?” If you think the item is more, select the word More. If you think it’s less, select the word Less. If you need help click the hint button.

1. hairs on your head ? More Less
2. seconds since you were born ? More Less (if you’re less than 31!)
3. people in the U.S. ? More Less
4. people in the world ? More Less
5. inches between New York and Los Angeles ? More Less
6. cells in your body ? More Less
7. letters mailed each week in the U.S. ? More Less
8. gallons of water Americans flush down
   their toilets every day ? More Less