You Think You're A Man (Not For Another 14 Years)

In the UK, the legal age to become an adult is 18 years old so you can officially do grown up things such as buy alcohol, serve on a jury, open a bank account, vote in elections or get a tattoo but while the law says you are officially mature enough to do all these things at 18, Neuroscientists at the University of Cambridge say the human brain doesn't mature into Adulthood until you are 32.
The boffins scanned the brains of 3,802 people from infancy through age 90 and concluded that the age of 32 marked one of four key changes the human brain experiences among five phases: Childhood, adolescent, adult, early aging, and late aging brain.
They identified ages 0 to 9 as childhood (Rapid growth in volume and formation of initial neural networks), and adolescence beginning after this point (Long phase of refining communication pathways, peak efficiency, and continuous rewiring) and lasting until about age 32.
Adulthood lasts from 32 until 66 (Architecture stabilizes, marking a plateau in personality and intelligence), then the next phase shifts into early aging from 66 to 83 and the last major turning point occurs around age 83, which the researchers describe as late aging of the brain (Gradual reduction in overall network connectivity).
Different mental skills peak at entirely different times across your lifespan, meaning there is no single age when your brain is best at everything.
Psychological and neuroscience data break down the peak of your brain functions at distinct ages so your peak information processing speed is 18–19, the capacity to hold information is at 25, when you hit 35 you are crest of being able to perform complex mental calculations peaks, social and emotional intelligence is best at 40–50 and you are at your most emotionally stable at age 65–75 and your vocabulary and cumulative knowledge is at its height from 68  to 72.
So if you want to win at a pub quiz, get a team of 68 to 72 years old although their short term memory is way past its prime so you may need to repeat the question 5 or 6 times to them.