The question of problem 1 should be "Numbers greater than or equal to 50"?

[p89]

I’m seeing the solution use “set.tailSet(50)”, so I think the result contains all numbers >= 50.

[Ammar_Ahmad_Farid]

Hello @p89 ,

Yes, you are right. The tailSet() method is used to return a view of the portion of the set whose elements are greater than or equal to the parameter element .