Tweeted By @TomerUllman
As a kid my dad told me "The age you consider 'old' is the square-root of your age times 10". At 9 you think 30 is old, at 16 you think 40, etc.
— Tomer Ullman (@TomerUllman) June 4, 2018
Turns out he was wrong.
It's the square-root of your age times 8. pic.twitter.com/wTIzcjyvYg