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Hello this is Presh Talwalkar. You credit card number probably looks pretty random to you. But hidden inside those mathematical digits, is a secret mathematical code. In this video, Ill teach you a magic trick based on this pattern Youll need a credit card, a debit card, or an ATM card that has 16 digits. Youll also want a pencil and paper to do simple calculations. For this video, Im going to do the calculation for the number thats written on the screen, but you should follow along with your credit card number. To get started, focus on the sixteen digits in the number, and separate them into two groups. For the first step, add up every other digit. In this case, the digits which are colored in black. Well add up 1, 3, 5, 7 ,8, 0, 0, 0, to get to a sum of 24. Well go ahead and double this result. 24*2 is 48 Now look at the numbers which you just added up Count the number of digits which are 5 or larger In this case, the numbers five, seven, and eight, are five or larger, so tha
