Correct: I do not like this kind of apples.
Incorrect: I do not like these kind of apples.
Correct: That sort of people is nice to talk with.
Incorrect: Those sort of people are nice to talk with.
Correct: These kinds of apples are sweet.
Incorrect; This kinds of apples is sweet.
Correct: He is the better of the two brothers.
Incorrect: He is the best of the two brothers.
Correct: This house is newer than that.
Incorrect: This house is more newer than that.
Correct: John is the best boy in his class.
Incorrect: John is a best boy in his class.