DAY 251:

Today’s Challenge

Here’s a special 24game-type challenge with a difference.

Using the numbers 1, 3, 4 and 6 once each, together with + – × ÷ available, it is possible to make lots of different target numbers, not just 24.

For instance:

  • to make 1: (3+4–6)×1 = 1
  • to make 2: (3+4–6)+1 = 2
  • to make 3: (6–4–1)×3 = 3 . . . and so on.

Using the same four numbers, can you make the target numbers 6, 12, 18 and 24?

The 7puzzle Challenge

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

The 2nd & 6th rows of the playing board contain the following fourteen numbers:

5    8    12    17    18    20    28    33    48    49    55    56    63    64

What is the sum of the multiples of 5?

Make 251 Challenge

Can you arrive at 251 by inserting 10, 20, 30, 40 and 50 into the gaps on each line?

  • (◯×◯+◯÷◯)÷√(◯–14) = 251
  • [◯×(◯÷◯)×(◯÷◯)]–7² = 251

Answers can be found here.

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