Ballpark #1 · Saturday, October 31, 2026

The largest known Rai stone and more

The Saturday, October 31, 2026 puzzle: five questions, each with a number for an answer. How close can you get?

How many billion years old is the Sun?Since it formed, as of 2025
How wide is the largest known Rai stone, the giant stone money of Yap island?Across the widest one that survives
How many kilograms does a whole wheel of Parmigiano Reggiano weigh, typically?One whole aged wheel of the cheese
How tall is an iPhone 16 (the standard model), from top edge to bottom edge?In millimetres, without a case
How many square metres of skin cover an average adult?Total surface area, adult man of 70 kg

100 players finished Ballpark #1. Average score: 515 of 1,000; 2% scored 800 or more.

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Show answers

🌞 How many billion years old is the Sun?4.6 billion years
It is about halfway through its life and will swell into a red giant in roughly five billion years.
Sources: en.wikipedia.org · science.nasa.gov
🪨 How wide is the largest known Rai stone, the giant stone money of Yap island?3.6 m
Yapese stone money is so heavy that ownership changes by agreement while the stones stay where they lie.
Sources: en.wikipedia.org · wondermondo.com
🧀 How many kilograms does a whole wheel of Parmigiano Reggiano weigh, typically?39 kg
Producers use roughly 550 litres of milk to make a single wheel, which then ages for at least 12 months.
Sources: turismo.mantova.it · en.wikipedia.org
📱 How tall is an iPhone 16 (the standard model), from top edge to bottom edge?147.6 mm
The larger iPhone 16 Plus is taller, at 160.9 mm, to fit a 6.7-inch screen.
Sources: apple.com · en.wikipedia.org
🧍 How many square metres of skin cover an average adult?1.8 m²
Guinness lists skin as the largest organ, weighing roughly 3.8 kg on that same 70 kg adult.
Sources: en.wikipedia.org · guinnessworldrecords.es