It’s officially “National Pi Day,” the nerdiest of fake food holidays, where companies that sell anything remotely pie-like offer up some sort of deal as an ode to the mathematical concept. Most places will give people coupons or sell items for the price of $3.14, but this year, Pizza Hut is making people work for their share of the pie (forgive the pun). According to KMOV, the chain will give away free pizzas today, but only if you are able to solve a series of math problems.

So are boxes of pepperoni and cheese worth dusting off those good old high school word problem skills for? Probably. Pizza Hut’s website notes that the chain will give 3.14 years worth of free pizza, in the form of $1,600 gift cards, to customers who are the first to correctly solve one of the three math puzzles. The restaurant teamed up with John H. Conway, a math whiz and a professor emeritus at Princeton University, to come up with three problems which range in difficulty from “high school to PhD level.”

The competition opened a few hours ago, and the answers so far are all over the place. So you may have a chance if you know “a ten-digit integer whose digits are all distinct. It happens that the number formed by the first n of them is divisible by n for each n from 1 to 10.” NBD.

There are probably easier ways to get free pizza from Pizza Hut. Last month, several UK outposts of the pizza chain gave away free pies Oscar weekend to any person who shared the same first name with a British Oscar nominee.

[via KMOV, Pizza Hut]