It's too late to change the kata design, it's been solved many times. (Also it teaches new c0ncept about arguments of functions, so why not?!)

Yes, it would've lmao

Yes true,I just wanted to practise ternary operators.

you could remove the " ? true : false" part

if the first element is not x, the program will return false because the else statement is inside the foreach loop.

wouldn't be easy if the function only takes an int array containing all the ages?
I'm just saying.

I just got a StackOverflowException xd