Baffling third grade math problem leaves internet stumped

A third-grade math problem recently went viral on social media, leaving the internet both divided and confused over what seemed like it should be a straightforward answer. Posted by a concerned mother on Reddit, the question sparked widespread debate, confusion, and a lot of humor, with many users joining in to try to solve it. This perplexing problem is a reminder of how even seemingly simple math can sometimes create unexpected challenges.

The Unexpected Challenge

The viral post originated from Reddit, where a user named @L8asUsual shared a math question given to a third grader. Dusty Sappington, a 40-year-old mom from Terry, Mississippi, turned to the internet for help after her eight-year-old daughter, Izzy, struggled with the question.

The math problem read: “Janell had 15 marbles. She lost some of them. How many does Janell have now?”

Izzy, confused by the question, simply responded with a question mark. Dusty, equally puzzled, circled the problem in red and posted it on Reddit, asking fellow users for help. What initially seemed like a straightforward problem quickly turned into a complex debate, as no one could definitively agree on the correct answer.

The Internet’s Reaction: Confusion and Humor

As soon as the post went live on Reddit, it exploded with comments. Some offered serious attempts at answers, while others made light of the situation. On the surface, the problem seemed simple enough. However, the lack of specific information—such as how many marbles Janell lost—left much to interpretation. Some users argued that the answer was obvious, while others thought the question was designed to be misleading.

One Redditor confidently declared, “< 15, but I don’t think that’s a fair third-grade question.” Others agreed, pointing out that the wording was vague and left no way to give a precise numerical answer. Another commenter humorously added, “Janell lost her marbles,” to which Dusty replied, “Me too,” perfectly capturing the shared frustration over the ambiguity.


The confusion didn’t end there. Some users tried to break down the problem mathematically, but the ambiguity of the phrase “lost some” kept the debate alive. One person pointed out, “If you quantify ‘some,’ it’s more than a couple but less than many, so the answer could be anywhere between 4 and 11 marbles.”

Dyslexia and Learning Challenges

Dusty also shared that her daughter Izzy has dyslexia, which made interpreting the vague wording of the problem even more challenging. Izzy attends a private school that helps students with learning disabilities while also providing a traditional education. Dusty said, “I haven’t found the answer yet, but I hope to see her graded paper soon.” She also speculated whether the question was designed to test students’ understanding of concepts like greater-than and less-than or if it was simply a poorly worded problem.

Common Mistakes in Solving Ambiguous Math Problems

This viral math problem highlights a common issue that students and parents often face—how to handle ambiguous questions. Sometimes, just a small detail in the wording can completely change how a question is understood, leading to confusion. In the case of this third-grade math question, the lack of clarity around how many marbles were lost left room for many different answers.

Here are some common mistakes that both students and adults make when faced with ambiguous problems like this:

  1. Overthinking the Problem: Many users on Reddit overanalyzed the word “some,” which led to detailed explanations that might not have been intended for a third-grade level.
  2. Misinterpreting Key Details: The word “lost” made many assume Janell had fewer than 15 marbles, but without specifying how many were lost, it was easy to fall into the trap of guessing.
  3. Assuming There’s Always a Specific Numerical Answer: Some math problems are designed to test reasoning and logic, rather than providing a specific number, which can be confusing if you’re used to always coming up with a concrete answer.

Analyzing the Math Problem Step-by-Step

To help clear up the confusion, let’s break down the problem step-by-step:

  1. What Do We Know? Janell started with 15 marbles. This is a clear, known fact.
  2. What Is Unclear? The problem states that Janell lost “some” marbles, but it doesn’t specify how many. This vague wording is the main reason why the problem is so challenging, as “some” could mean anything from 1 to 14.
  3. Possible Interpretations:
    • If Janell lost just one marble, she could have 14 marbles left.
    • If she lost nearly all of her marbles, she could have anywhere between 1 and 14 left.
    • Since the problem doesn’t specify how many marbles were lost, it’s impossible to give a single, definitive answer.

The Most Logical Answer: Without knowing exactly how many marbles were lost, the best answer we can provide is that Janell has fewer than 15 marbles. In this case, the answer could be framed as “< 15,” but again, this may not satisfy everyone looking for a specific number.

The Takeaway: The Importance of Clarity

In the end, this viral third-grade math problem remains unsolved for many. The most accurate response is likely that Janell has fewer than 15 marbles left, but without further information, it’s impossible to provide a precise answer. This ambiguity is what made the problem so baffling in the first place.

The larger takeaway from this incident is that even seemingly simple questions can create confusion, especially when they lack clarity. For students, parents, and educators, it’s a reminder of the importance of giving clear instructions and teaching critical thinking skills. Math problems like this show how essential it is to ensure that the language used is specific and that the goals of the problem are clearly communicated.

So, what do you think the correct answer to this tricky math problem is? Let us know in the comments!

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