I couldn’t resist computing my “number sense” using the link http://www.panamath.org/testyourself.php
Although, to be honest, it seemed more like an exercise in focus. I had just had my morning cup of coffee, so I didn’t disgrace myself!
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madame scientist's not-so-mad musings 
Interesting test. It took 10 minutes but I achieved a respectable 90% percentile. A bit down from my school days but not horrible.
Same here. When my attention wandered, I made errors. When I told myself to focus, I got them right. That’s why I felt it was more of a test on my attention span.