Do odd-numbered headlines really get more clicks?
Short and possibly surprising answer: yes. Generally speaking, that is.
Articles with '3 ways to…' or '5 tips on…' in the headline can increase your clickthrough rate and regularly outperform those with even numbers. Some research even suggests that headlines with odd numbers get 73% more social shares and engagement.
Remarkably, it’s not marketing folklore. There’s real psychology behind why your brain stops scrolling for a list of five but skips past a list of six. And it all starts with how we process information.
Why do odd numbers work?
Our brains prefer brevity
Humans are all about the short and sweet. A study by behavioural economist George Loewenstein found that people want short lists of insights on subjects they care about. Small amounts of focused material increase curiosity. Too much and interest drops off.
With attention spans shrinking and competition for them rising, concise content wins.
We naturally group in threes and fives
Simply put, grouping information together makes it easier for the human brain to remember. And similar to how we group mobile numbers, area codes and bank details, our working memory tends to chunk numbers together in groups of three to five. Which, conveniently, are the exact numbers that allow readers to absorb information better, according to a study of over 300 articles.
But it’s not just about comprehension, it’s also about trust. With evenly numbered lists, readers can subconsciously assume that something’s either been added or removed from the article to keep the list to a round number.
But no more than nine
This might seem arbitrary, but studies show that the human mind struggles to retain information of more than nine items in a row. Breaking longer content into odd-numbered chunks, but no more than nine, helps the brain to process it.
In our scan-don't-read culture, this seemingly small number choice could have a huge impact.
So, what could odd numbers do for your brand?
Now we understand the psychology, let’s look at the possible benefits for you.
1. It could help build trust
Odd numbers suggest you've included everything relevant, not padded or cut to hit a round number. There's an honesty to seven that four doesn't have. When your audience trusts your content, they're more likely to engage with it.
2. It could improve recall
Even numbers create symmetry, which is visually pleasing but forgettable. Odd numbers create a slight imbalance, and that makes them lodge in your memory. Better recall means your content (and your brand) sticks around longer.
3. It could drive action
Odd numbers avoid the mental stalemate of perfect balance. They feel decisive where even numbers feel neutral. And when your audience gets that sense of conclusion, they're more ready to act.
So yes, odd as it is, odd numbers can really work. But they're not a magic fix. No headline trick will compensate for weak content. Our advice? Start with quality, then use psychology to amplify it.
Looking for content strategy that gets the fundamentals right? Drop us a line at hello@crackedmarketing.co.uk
