John buys 3 boxes of burritos. He gives away a 3rd of them to his friend. Each box has 20 burritos. He eats 3 burritos per day for 10 days. How many burritos does he have left?
Step-by-step reasoning process below:
10
He gave 3 / 3 = 1 box away.

So he has 3 - 1 = 2 boxes.

So he got 2 * 20 = 40 burritos.

He ate 3 * 10 = 30 burritos.

So he has 40 - 30 = 10 burritos left.

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Final answer: 10