Antonyms of adj problematical

2 senses of problematical

Sense 1
debatable, problematic, problematical -- (open to doubt or debate; "If you ever get married, which seems to be extremely problematic")

INDIRECT (VIA questionable) -> unquestionable -- (incapable of being questioned; "unquestionable authority")

Sense 2
baffling, elusive, knotty, problematic, problematical, tough -- (making great mental demands; hard to comprehend or solve or believe; "a baffling problem"; "I faced the knotty problem of what to have for breakfast"; "a problematic situation at home")

INDIRECT (VIA difficult) -> easy -- (posing no difficulty; requiring little effort; "an easy job"; "an easy problem"; "an easy victory"; "the house is easy to heat"; "satisfied with easy answers"; "took the easy way out of his dilemma")

Similarity of adj problematical

2 senses of problematical

Sense 1
debatable, problematic, problematical -- (open to doubt or debate; "If you ever get married, which seems to be extremely problematic")
       => questionable (vs. unquestionable) -- (subject to question; "questionable motives"; "a questionable reputation"; "a fire of questionable origin")

Sense 2
baffling, elusive, knotty, problematic, problematical, tough -- (making great mental demands; hard to comprehend or solve or believe; "a baffling problem"; "I faced the knotty problem of what to have for breakfast"; "a problematic situation at home")
       => difficult (vs. easy), hard -- (not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?")