Kata

How can this be a mistake:

✘ Expected: 2.718281828, instead got: 2.718281829 ✔ Test Passed: Value == 2.7182818285

2.7182818285 rounds to 2.718281829, not to value that expected some troubles)

Simple, nice and fair! :-)

The kata needs to have some test cases.

Here's a set I used:

Test.assertEquals(Math.roundTo(3.1415926535, 4), 3.1416);
Test.assertEquals(Math.roundTo(4, 5), 4);
Test.assertEquals(Math.roundTo(4.1235343424, 6), 4.123534);
Test.assertEquals(Math.roundTo(5.3035802, 3), 5.304);
Test.assertEquals(Math.roundTo(0.9384930193848595, 15), 0.938493019384860);
Test.assertEquals(Math.roundTo(9.9999, 3), 10);

Adding example test cases would greatly improve the quality of this kata :)