Number Trick - Numberphile
Just a quick number trick with Dr James Grime. More links & stuff in full description below ↓↓↓ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook....
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DR. JAMES GRIME: So we're going to do a little mathematical trick that I'm hoping that people will like and they'll try out on their friends and family. So let's do it. We're going to write out four-digit numbers. So like this, right? Now, you've got 3,485, but we'll take it in turns. So give me a four-digit number. You could just shout out four digits if you want. Go on. BRADY HARAN: You want one from me? DR. JAMES GRIME: Yeah. BRADY HARAN: 7,721. DR. JAMES GRIME: 7,721. And now I'll come up with a different one, like 2,278. Give me another. BRADY HARAN: 1,891. DR. JAMES GRIME: 1,891. And I'll come up with another one, like 8, 1-- something-- 8. And we're going to add these together. 3,485, 7,721...
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DR. JAMES GRIME: So we're going to do a little mathematical trick that I'm hoping that people will like and they'll try out on their friends and family. So let's do it. We're going to write out four-digit numbers. So like this, right? Now, you've got 3,485, but we'll take it in turns. So give me a four-digit number. You could just shout out four digits if you want. Go on. BRADY HARAN: You want one from me? DR. JAMES GRIME: Yeah. BRADY HARAN: 7,721. DR. JAMES GRIME: 7,721. And now I'll come up with a different one, like 2,278. Give me another. BRADY HARAN: 1,891. DR. JAMES GRIME: 1,891. And I'll come up with another one, like 8, 1-- something-- 8. And we're going to add these together. 3,485, 7,721...
