Awesome maths skills

[torkell]

Every once in a while you find an example of truly awesome maths skills:

Watch on YouTube

Comments

[omgimsuchadork.livejournal.com]

I got the same answer (I thought the timer was going to run longer, though)! :D In grade school, we used to play 24 a lot to sharpen our arithmetic skills, so this was just like a larger-scale version of that.

P.S., 953 was easy and obvious. XD