DAY 200:

Today’s Challenge

Playing the superb American maths card game, 24game, can be frustrating but very addictive when testing your arithmetical skills.

When using four numbers just once each, with + – × ÷ available, it is only possible to make 24 with one of the seven groups of numbers below. Which one?

  •      1     1     7     6
  •      1     1     7     7
  •      1     1     7     8
  •      1     1     7     9
  •      1     1     7    10
  •      1     1     7    11
  •      1     1     7    12

Let us know if you have an answer!

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 6th & 7th rows of the playing board contain the following fourteen numbers:

4    5    11    12    18    20    24    27    30    33    49    56    70    77

Which is the only cube number listed?

Make 200 Challenge

Can you arrive at 200 by inserting 10, 20, 25 and 40 into the gaps below?

(◯–◯÷◯)×◯ = 200

Answers can be found here.

Click Paul Godding for details of online math tuition. Wherever you are in the world, please get in touch.

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