Question 1043228: Jay's credit card number has 16 digits.The sum of any three adjacent digits is 13,and the second digit is 2 and the tenth digit is 4.what are the last three digits of the credit card number?
Answer by richard1234(7193)   (Show Source):
You can put this solution on YOUR website! The 1st, 4th, 7th, 10th, 13th, and 16th digits must be equal since d1 + d2 + d3 = d2 + d3 + d4 = 13, etc.
Similarly, the 2nd, 5th, 8th, 11th, 14th digits are equal and so are the 3rd, 6th, 9th, 12th, 15th.
The credit card number is 4274274274274274 and the last three digits are 274.
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