Completely flew over my head to use ternary operators here!

Conditional operator

What does the ? and : mean in Javascript?

The second part (true or false) is unnecesary. It's already assesed in the parentheses

-1, needs more ?:.

More test cases for final attempt

I see this sort of thing a lot in code, and it's redundant. You should just return the original conditional check. Consider it as if it were the folowing:

if (isTrue)
  return true;
else
  return false;

The above would be better written:

return isTrue;

Same idea with what is written in this solution.

this

Almost all comments are issues (more than 40), and the satisfaction rating is 90%, weird.

Add a bit more test cases for final submit

Few test cases provided. You could make it harder with invalid input.

Too easy for even a 8kyu kata. Needs a bit more complexity and random test cases.

Duplicates a lot of other katas. Way too easy. No random test cases.

I suggest making this kata at least a bit more difficult. Here are some ideas:

• Adding a second argument and checking if the first is divisible by the second;
• Checking for negative numbers;

• Could be generalized into a more robust, yet still easy, kata.

• Lacking test cases