And though Bruce's 192 IQ and 23 languages vocabulary make him a bonafide genius, Tony's IQ of 270 puts him in the top 0.01% of smartest people in the world.
However, his engineering acumen does make him smarter than Batman in at least one place, so it does count. Batman's intelligence is more well rounded, but Iron Man has him beat in some particular areas.
Genius Level Intellect: Batman is noted as having an I.Q. of 1045. Martial Arts: Batman is a master of martial arts from across the universe, able to catch the original Batman off-guard and defeat him with a single blow; he is also known to incorporate psychic attacks into his fighting style.
Tony Stark's IQ is estimated at 270 which means that he is a super genius. Only 0.1% of the population comes close to that score. He has invented that many suits and also a new element was discovered by him.
Martian Manhunter. With an IQ far greater than any human being, J'onn J'onnz has lived the lives of multiple people for hundreds of years. He has travelled the Earth, travelled throughout the DC Universe, learnt about their sciences, technology, society, politics and speaks multiple languages.
Scientific aptitude and knowledge. Apart from his physical abilities, Peter is an intellectually-gifted scientific teen genius and has a prodigious aptitude in the physical sciences, with a high IQ level of around 250.
Hulk and Banner are two distinct entities. Banner remaining inside of Hulk doesn't change Hulk's IQ. Which Hulk? If we're talking Savage Hulk, I'd put his IQ right around 99 on the Current “Wechsler IQ Classification” scale.
It's not hard to see that among all the Avengers, T'Challa is the most intelligent one. He might've lacked Tony and Bruce's outright genius, but wit without cunning can be useless; T'Challa was the perfect combination of brains, empathy, and brawn.
Exceptional Cognitive Abilities: Individuals with high IQs often demonstrate exceptional cognitive abilities, including advanced problem-solving skills, critical thinking, and abstract reasoning [3].
Terrific, and Lex Luthor. The Penguin acknowledges the Riddler's intelligence, stating he could rival even Batman and Mr. Terrific. The Riddler's intellect has been recognized in DC Comics for his ability to challenge and outwit Batman at an intellectual level.
While Iron Man certainly holds his own in combat, in a hand-to-hand showdown, it's highly likely that Batman would come out on top due to his superior physicality and combat skills.
Mr. Fantastic is another polymath—he's a master of a wide variety of scientific disciplines: rocket science, biology, physics, extraterrestrial studies, and so much more. Iron Man is known for being arrogant but even he would admit that Mr. Fantastic is way smarter than he is.
Thanos was educated on Titan among his fellow Eternals and learned many secrets of the universe in his travels. Iron Man is intelligent, but Thanos is smarter than Iron Man could ever be.
However, it's Tim Drake who is arguably more intelligent than his mentor, and DC needs to do more to admit it. First appearing in Batman #436 back in 1989, Tim Drake didn't officially take on the role of Robin until Batman #457 in December of 1990.
Given the changes to testing across the decades, it is also tricky to compare scores achieved at different times. Theoretically, there is no limit to IQ scores. 200 is often seen as the theoretical peak score but some people have shot past that number.
Although he is an extremely skilled marksman, Clint Barton is often considered to be the weakest member of the team seeing as he's just a regular guy with a bow and arrow.
Genius-Level Intellect: Even in his youth, Thanos was deemed a genius among his kind, despite his deformation. His long life allowed Thanos to refine his intellectual aptitude to the highest degree, making him exceptionally intelligent.
The Hulk, on the other hand, is often seen as a stupid, savage brute with a very limited vocabulary. While there have been versions of the Hulk with Banner's intelligence, most people still stereotype the Hulk as a big, dumb, green monster. Surprisingly, however, this is not true.
In the Silver Age, it was Superman's “super-memory” which allowed him to recall his own birth and the destruction of Krypton. Kryptonian super-intelligence was similarly given as the reason that Krypto, when exposed to our yellow sun, could think and reason on a human level.
Nova (Richard Rider) considered Rocket one of the smartest and funniest persons he'd met, calling him brave and sharp and saying humans could learn from him. Rocket is named after The Beatles song' "Rocky Raccoon" (which incidentally is also his nickname).
Spider-sense + spider reflexes + spider speed + spider strength, even Batman's martial arts skills are no match. Sure, he could land one lucky hit that could take Spidey out but statistically speaking, on paper he'd lose.
