There are two pizza ovens in a restaurant. Oven 1 burns three times as many pizzas as Oven 2. If the restaurant had a total of 12 burnt pizzas on Saturday, how many pizzas did Oven 2 burn?

Let's assume the number of pizzas burned by Oven 2 as "x".
Given that Oven 1 burns three times as many pizzas as Oven 2, the number of pizzas burned by Oven 1 would be 3x.
The total number of burnt pizzas on Saturday is given as 12, so we can write the equation:
x + 3x = 12
Combining like terms:
4x = 12
x = 12 ÷ 4
x = 3
Therefore, Oven 2 burned 3 pizzas on Saturday.