fix: replace .english.md extension with .md

curriculum/challenges/english/10-coding-interview-prep/project-euler/problem-240-top-dice.md

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+---
+id: 5900f45d1000cf542c50ff6f
+challengeType: 5
+title: 'Problem 240: Top Dice'
+forumTopicId: 301887
+---
+
+## Description
+<section id='description'>
+There are 1111 ways in which five 6-sided dice (sides numbered 1 to 6) can be rolled so that the top three sum to 15. Some examples are:
+
+
+D1,D2,D3,D4,D5 = 4,3,6,3,5
+
+D1,D2,D3,D4,D5 = 4,3,3,5,6
+
+D1,D2,D3,D4,D5 = 3,3,3,6,6
+
+D1,D2,D3,D4,D5 = 6,6,3,3,3
+
+In how many ways can twenty 12-sided dice (sides numbered 1 to 12) be rolled so that the top ten sum to 70?
+</section>
+
+## Instructions
+<section id='instructions'>
+
+</section>
+
+## Tests
+<section id='tests'>
+
+```yml
+tests:
+  - text: <code>euler240()</code> should return 7448717393364182000.
+    testString: assert.strictEqual(euler240(), 7448717393364182000);
+
+```
+
+</section>
+
+## Challenge Seed
+<section id='challengeSeed'>
+
+<div id='js-seed'>
+
+```js
+function euler240() {
+
+  return true;
+}
+
+euler240();
+```
+
+</div>
+
+
+
+</section>
+
+## Solution
+<section id='solution'>
+
+```js
+// solution required
+```
+
+</section>