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ipynb/Countdown.ipynb
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@ -22,9 +22,9 @@
"On January 1, 2016 Alex Bellos [posed](http://www.theguardian.com/science/2016/jan/04/can-you-solve-it-complete-the-equation-10-9-8-7-6-5-4-3-2-1-2016) this New Year's puzzle:\n",
"\n",
"\n",
"> Fill in the blanks so that this equation makes arithmetical sense:\n",
">Fill in the blanks so that this equation makes arithmetical sense:\n",
"\n",
"> 10 ␣ 9 ␣ 8 ␣ 7 ␣ 6 ␣ 5 ␣ 4 ␣ 3 ␣ 2 ␣ 1 = 2016\n",
"10 ␣ 9 ␣ 8 ␣ 7 ␣ 6 ␣ 5 ␣ 4 ␣ 3 ␣ 2 ␣ 1 = 2016\n",
"\n",
"> You are allowed to use *only* the four basic arithmetical operations: +, -, ×, ÷. But brackets (parentheses) can be used wherever needed. So, for example, the solution could begin\n",
"\n",
@ -589,7 +589,7 @@
" \n",
"> The most famous “fill in the gaps in the equation” puzzle is known as the [four fours](https://en.wikipedia.org/wiki/Four_fours), because every equation is of the form\n",
"\n",
"> 4 ␣ 4 ␣ 4 ␣ 4 = X.\n",
"4 ␣ 4 ␣ 4 ␣ 4 = X.\n",
"\n",
">In the classic form of the puzzle you must find a solution for X = 0 to 9 using just addition, subtraction, multiplication and division.\n",
"\n",