Soda comes in groups of 6
dogs
what comes in groups of 12
Arms, legs.
Inches in a foot
gaggle of geese
In mathematics, a group of 15 items is known as a quindecad. Some common items that come in groups of 15 include eggs in a carton, months in a quarter, and players on a rugby team. Additionally, elements in the lanthanide series of the periodic table have atomic numbers that are multiples of 15.
Case of beer
Pennies
scorpion legs
They are the 17 times tables
7 days in a week.