--- id: 5900f4a71000cf542c50ffba challengeType: 5 title: 'Problem 315: Digital root clocks' videoUrl: '' localeTitle: '' --- ## Description undefined ## Instructions undefined ## Tests ```yml tests: - text: '' testString: 'assert.strictEqual(euler315(), 13625242, "euler315() should return 13625242.");' ``` ## Challenge Seed ```js function euler315() { // Good luck! return true; } euler315(); ``` ## Solution ```js // solution required ```
euler315()