funny kata, since when was "y" a vowel :(

literally right there in the first word of your comment

Keep practicing, you can do it.

From the first paragraph of the Wikipedia article about Y (emphasis mine):

Y, or y, is the twenty-fifth and penultimate letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. According to some authorities, it is the sixth (or seventh if including W) vowel letter of the English alphabet. In the English writing system, it mostly represents a vowel and seldom a consonant, and in other orthographies it may represent a vowel or a consonant. Its name in English is wye (pronounced /ˈwaɪ/), plural wyes.

great kata, viva to the author!

Ditto, which is odd because I changed the test data to (1,1000000) and it passes. I assume that would be the largest range. Is there something I'm missing?

everything passed except for the "Execution timed out (12000 ms)"

funny kata, since when was "y" a vowel :(

This one is a good joke..

lmaoooo, no way this guy is serious

lmaoooooooo, just great, better yet the solution is thinking out of the box

The kata is great.
Hint: Look at the series carefuly (Especially look at divisors, how it changes)

Read other solutions, see how could you make it shorter. And the number of lines doesn't necessarily reflect the kata's difficulty.

7 kyu?? bro i had to write a whole 26 line switch case statement

greatest description i have ever seen on this site, viva!