DAY 344

Today’s Challenge

Which 4-digit number has all these properties?

  •  its second digit is twice the first,
  •  its fourth digit is three times the third,
  •  all its digits are different,
  •  no two of its digits are consecutive.

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The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 1st & 6th columns of the playing board contain the following fourteen numbers:

7     13     21     22     27     30     36     40     49     54     55     56     60     64

Which two numbers, when each is doubled, also appear on the list?

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Answers

. . . can be found when clicking this.

7puzzleblog

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