A Chinese company’s creative interview puzzle reveals how rigid thinking can kill your chances—and why the winning answer had nothing to do with multiplication.
In a cramped interview room in China, three candidates sat before the same hiring manager. The question seemed elementary: “A hen lays five eggs per week. How many eggs does it lay in a month?” One applicant snickered and was dismissed. Another swiftly answered “20” and was shown the door. Only the third, who refused to give a single number, walked away with the job.
The viral hiring scenario, reported by China Times and widely shared across social media earlier this month, has reignited discussions about the purpose of unconventional interview questions. What appears to be a simple arithmetic problem is actually a test of critical thinking, adaptability, and the ability to challenge assumptions—skills increasingly prized in today’s volatile business landscape.
The Trap of the Obvious Answer
When the second candidate confidently declared “20 eggs” (five eggs multiplied by four weeks), the interviewer reportedly remained silent. On the surface, the math is correct. But the problem deliberately ignores real-world variables: a month is rarely exactly four weeks, a hen’s health fluctuates, and production can drop due to weather, feed quality, or stress.
“The candidate treated a workplace question like a primary school math test,” says Dr. Liu Wei, a Hong Kong-based organisational psychologist. “Employers aren’t looking for human calculators. They want people who question the premises, consider edge cases, and communicate their reasoning.”
The third candidate’s response illustrated exactly that. Instead of offering a fixed number, he explained that no single answer exists—because the number of days in a month varies, and egg output depends on the hen’s condition. His answer demonstrated awareness of uncertainty and a systematic approach to problem-solving.
What Employers Really Want to See
Creative interview questions, often called “brainteasers” or “stress tests,” are designed to reveal a candidate’s thought process under pressure. Common examples include “How many piano tuners are in Chicago?” or “Why are manhole covers round?” The goal is not a correct figure but an organised, logical, and flexible response.
In this case, the first candidate failed by displaying a dismissive attitude—a fatal error in any professional context. The second failed by jumping to a conclusion without analysis. The third succeeded by framing the problem broadly, acknowledging variables, and articulating a nuanced perspective.
HR consultant Emily Tse, who conducts interview training in Hong Kong, advises job seekers to treat such questions as opportunities. “Pause, think out loud, and show your reasoning. Ask clarifying questions if needed. The interviewer wants to see how you handle ambiguity—because that’s what real work looks like.”
Broader Implications for Job Seekers
This incident highlights a growing trend among employers to prioritise soft skills—critical thinking, communication, and adaptability—over technical recall. As automation handles more routine calculations, human value lies in creativity and judgment.
For candidates in Hong Kong and beyond, the lesson is clear: never accept a question at face value. Whether the topic is eggs, dumplings (another popular interview puzzle: “Is a dumpling male or female?”), or milk poured into the sea, the winning approach is to demonstrate intellectual curiosity and humility.
What to Do If You Face a Tricky Interview Question
- Pause and restate: Clarify the question before answering. For example, “When you say ‘month,’ do you mean a calendar month or a 30-day period?”
- Think out loud: Walk the interviewer through your logic. This shows confidence and transparency.
- Acknowledge uncertainty: It’s okay to say “it depends” and then explain the variables.
- Connect to real work: If possible, draw parallels to how you’d handle similar complexity on the job.
In the end, the “correct” answer to the hen-and-eggs puzzle was never a number. It was a mindset—one that recognises that in business, as in life, the only certainty is uncertainty itself.