It turns out that single people in many situations prefer divisible numbers (for example, 60). This applies to prices, sizes, and even hotel rooms (see Yan & Sengupta, 2021 ).
It sounds strange, but here's the reason: your brain uses sensory communication to understand abstract concepts such as sociality and numbers.
Many ideas are imbued with the same communication structure. You want to communicate with people (connections in society) - your brain will want any connection (for example, numbers).
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This price is associated with many numbers. The brain confuses this numerical connection with social connection . You conclude, “Hmm, will I be making connections? Something tells me that I will communicate with many people. "
In other words, this price corresponds to your primitive desire.
Takeaway : If you're shopping for a social product, your brain prefers divisible numbers (e.g., prices, sizes, versions) because numerical connectivity feels like social connectedness. Both ideas are built from the same building block.