Based on the information given:
⇒ there are 12 people --> Emily, Delvenal, 10 other friends
⇒ the pan of brownies needs to be evenly split among them.
Consider the possibilities:
- One option: cut the pan of brownies into the 12 pieces
⇒ so that everyone gets one piece of brownie
- Second Option: cut the pan of brownies into 24 pieces
⇒ so that everyone can gets two piece of brownie
In other words, you can cut a number of pieces that must be divisible by 12 in other to split equally within the group.
Hope that helps!
