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Given one, get the other three (Posted on 2017-12-18)

A 2-digit number, divisible by 11, is multiplied by 99.

If the 3rd digit is 7, what is the 4-digit product?

No Solution Yet Submitted by Ady TZIDON

Rating: 3.0000 (1 votes)

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solution

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  k                    k*11*99

  1                      1089                                                   
  2                      2178                                                   
  3                      3267                                                   
  4                      4356                                                   
  5                      5445                                                   
  6                      6534                                                   
  7                      7623                                                   
  8                      8712                                                   
  9                      9801

22*99=2178, the only one with a 7 in the 3rd position .

Posted by Charlie on 2017-12-18 14:09:02

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