Question

Maximo likes to eat cookies for breakfast every day. He eats 2 cookies per day. Three days after opening a box of cookies, there are 6 cookies left on the box. How many cookies were there at the start?

Answer 1

There were 12 cookies at the start

Explanation:

Since Maximo likes to eat 2 cookies per day, after three days, he would have eaten 6 cookies. There are 6 cookies left after 3 days, so 6(amount he ate) + 6(amount of cookies left) is 12.