“What is zero divided by zero?”

If you ask Siri this question in the iOS 8 operating system, the iPhone’s virtual assistant will cleverly tell you that you’re making no sense.

“Imagine that you have zero cookies,” Siri’s response begins, “and you split them evenly among zero friends. How many cookies does each person get? See? It doesn’t make sense.

“And Cookie Monster is sad that there are no cookies, and you are sad that you have no friends.”

Here’s Siri in action, telling The Washington Post’s mobile Web editor Mark Smith that he has no friends.

The sassy answer appears to be working only for iPhone users with the upgraded operating system.

It’s not clear who first discovered it, but the question caught on Monday night after Vine star Lauren Giraldo, YouTube star Troye Sivan and “Breaking Bad” actor Aaron Paul excitedly tweeted about it.

The discovery raises two questions of its own: first, what IS zero divided by zero? And second, what else can I ask Siri to get her to sass me?

Although some might argue that it’s more fun to uncover Siri’s Easter Eggs on your own, there are quite a few lists out there suggesting some sure-fire Siri-isms.

For instance, if you tell Siri “I’m drunk,” Siri responds: “Just don’t breathe on me.”

Ask Siri to “read me a haiku,” and she’ll respond:

Sometimes I wonder

What it would be like to say

“I’d prefer not to.”

And one more: ask Siri “What’s your favorite animal?” and Siri responds, “Maybe a tauntaun. But only when I’m cold.”

Mark W. Smith contributed to this report and allegedly needs friends.