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The Numbers Nut
You’re tasked with splitting the bill when out to eat with friends. And that’s fine by you, because calculators are for wimps.
Try: Math QuizUp (iOS, Android).
Game play: Multiple-choice mental math while racing the clock and an opponent. Ten questions times 10 seconds each equals a whole lot of grade-school flashbacks.
Details: Made by the same people as QuizUp; you’ll see ads between rounds.
You’re pretty sure you could be best buds with Han Solo, Harry Potter or Katniss Everdeen. After all, you already know their secrets.
Try: NerdTrivia (iOS).
Game play: You get an hourly question while the game is active (starts again Jan. 30). It’s heavy on pop culture, but don’t be surprised if you have to recall the Pythagorean theorem. Play against Twitter friends and strangers worldwide.
Details: The game started on Twitter, and Android users can still play through that social network.
The big games — football, baseball, basketball and hockey — are your mental playground, and you can spout stats and draft history like a champ.
Try: Sports Genius (iOS, Android).
Game play: How many times have the White Sox won the World Series? Go 15 multiple-choice rounds for a personal best. Be quick; it’s a race against the shot clock.
Details: The free version is limited to general sports trivia. Pay to play more categories divided by sport, team or region.
Poll: Which is your favorite among Billboard's current top 10 holiday songs?