Ballpark #2 · Sunday, November 1, 2026

The Sydney Opera House, the Great Blue Hole and more

The Sunday, November 1, 2026 puzzle: five questions, each with a number for an answer. How close can you get?

How many tiles cover the roof shells of the Sydney Opera House?The white and cream tiles on the sails
How wide is the Great Blue Hole, the giant marine sinkhole off Belize?Across the rim of the circle
How many litres of blood does a typical adult human body hold?On average, for an adult of about 70 kg
By how many degrees is Earth tilted on its axis?Tilt of the axis, today
How far did the Wright brothers' first powered flight travel, on 17 December 1903?The first of the four flights that day

190 players finished Ballpark #2. Average score: 427 of 1,000; 1% scored 800 or more.

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Show answers

🎭 How many tiles cover the roof shells of the Sydney Opera House?1,056,006
From afar the sails look plain white, but glossy white and matte cream tiles from Sweden form a subtle chevron pattern.
Sources: en.wikipedia.org · sydneyoperahouse.com
🕳️ How wide is the Great Blue Hole, the giant marine sinkhole off Belize?318 m
Below a hydrogen sulfide layer about 91 m down, the sinkhole water holds no oxygen and no life.
Sources: en.wikipedia.org · over-view.com
🩸 How many litres of blood does a typical adult human body hold?5 L
Blood makes up roughly 7 to 8 percent of your body weight, so larger bodies hold more of it.
Sources: en.wikipedia.org · hypertextbook.com
🌍 By how many degrees is Earth tilted on its axis?23.4°
This tilt, not distance from the Sun, is what gives us the seasons.
Sources: en.wikipedia.org · science.nasa.gov
✈️ How far did the Wright brothers' first powered flight travel, on 17 December 1903?36.6 m
That flight lasted 12 seconds; the fourth and longest of the day, by Wilbur, covered about 260 m in 59 seconds.
Sources: en.wikipedia.org · airandspace.si.edu