A car going 60 mph went around a circular track in 15 minutes. How wide is the track?

17:05
2 times (10 + 16 / 2 x 8) = ? BECAREFUL, many will do this in the WRONG ORDER!

17:54
The Algebra Step that EVERYONE Gets WRONG!

18:25
The SAT Question Everyone Got Wrong

11:31
Solving a 'Harvard' University entrance exam

8:36
The 362-Page Proof That 1+1=2

19:37
Is this the Coolest Approximation for e?

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Die außergewöhnlichsten Mädchen der Welt

19:11