What's the average number of…?

206 bones bones in an adult human body The human body 32 teeth teeth in an adult human mouth The human body 46 chromosomes chromosomes in a human cell The human body 100,000 beats heartbeats in a day The human body 20,000 breaths breaths a person takes in a day The human body 100,000 hairs hairs on a human head The human body 17 blinks times a person blinks in a minute The human body 10,000 taste buds taste buds on a human tongue The human body 600 muscles muscles in the human body The human body 36,000,000,000,000 cells cells in a human body The human body 5,000 steps steps a person walks in a day The human body 16,000 words words a person speaks in a day The human body 7 hours hours an adult sleeps a night The human body 4.9 people people in a household worldwide Everyday life 195 countries countries in the world Everyday life 38 zones time zones in use Everyday life 88 keys keys on a piano Everyday life 64 squares squares on a chessboard Everyday life 52 cards cards in a deck Everyday life 26 letters letters in an alphabet Everyday life 1,665 steps steps to the top of the Eiffel Tower Everyday life 365.2422 days days in a year Everyday life 86,400 seconds seconds in a day Everyday life 42 teeth teeth in an adult dog Animals 3 hearts hearts in an octopus Animals 7 vertebrae vertebrae in a giraffe's neck Animals 0 bones bones in a shark Animals 5 eyes eyes on a honeybee Animals 50,000 bees bees in a hive in summer Animals 2,500,000 ants ants for every human on Earth Animals 1 stomach stomachs in a cow Animals 300 eggs eggs a laying hen produces in a year Animals 8 planets planets in the solar system Space 95 moons moons orbiting Jupiter Space 200,000,000,000 stars stars in the Milky Way Space 5,500 exoplanets confirmed planets outside our solar system Space 16 orbits orbits the ISS completes in a day Space 687 days Earth days in a Martian year Space 200 seeds seeds on a strawberry Food and drink 7 holes holes in a Ritz cracker Food and drink 12 grapes grapes eaten at Spanish New Year Food and drink 1,000,000 bubbles bubbles in a glass of champagne Food and drink 2,000 kcal calories in a reference daily diet Food and drink 2.2 litres litres of water a person needs a day Food and drink 280 characters characters allowed in a tweet Technology 100 passwords passwords one person has Technology 80 apps apps installed on a smartphone Technology 8 bits bits in a byte Technology 43,252,003,274,489,856,000 positions possible positions of a Rubik's cube Technology 8,500,000,000 searches Google searches made in a day Technology 284,614,269 vehicles registered vehicles in the United States Transport 100,000 flights commercial flights in a day worldwide Transport 272 stations stations on the London Underground Transport 1,000,000,000 bicycles bicycles in the world Transport 1,750 hours hours worked in a year Work and money 12.7 jobs jobs a person holds in a lifetime Work and money 120 emails work emails a person receives in a day Work and money 364 licks licks to finish a lollipop Delightfully useless 119 ridges ridges on the edge of a US quarter Delightfully useless 1,008 pieces pieces in a 1,000-piece jigsaw Delightfully useless 50,000 grains grains of rice in a kilogram Delightfully useless 18 holes holes on a golf course Delightfully useless 42 dots dots on a pair of dice Delightfully useless 22 players players on a football pitch Delightfully useless