Ballpark #7 · Friday, November 6, 2026

A 2 euro coin, Tokyo Skytree and more

The Friday, November 6, 2026 puzzle: five questions, each with a number for an answer. How close can you get?

How wide can the eye of a giant squid be across?Largest recorded eyes
How many different positions can a standard 3x3 Rubik's Cube be twisted into?Count of possible arrangements
How wide is a 2 euro coin?Diameter of the coin
How many bitcoins will ever exist, according to its rules?The hard cap in the protocol
How tall is Tokyo Skytree, the broadcasting tower in Japan's capital?Full height of the tower

147 players finished Ballpark #7. Average score: 370 of 1,000; 2% scored 800 or more.

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Show answers

🦑 How wide can the eye of a giant squid be across?about 27 cm
A giant squid's eye can be about the size of a dinner plate, among the largest of any living animal.
Sources: en.wikipedia.org · nationalgeographic.com
🧊 How many different positions can a standard 3x3 Rubik's Cube be twisted into?43.25 quintillion
A cube for each one would cover the Earth's surface hundreds of times, yet any is solvable in at most 20 moves.
Sources: en.wikipedia.org · ruwix.com
🪙 How wide is a 2 euro coin?25.75 mm
The 2 euro coin has a two-tone design, and its fine-milled edge carries lettering that differs by issuing country.
Sources: ecb.europa.eu · en.wikipedia.org
₿ How many bitcoins will ever exist, according to its rules?21 million
The reward for mining new coins halves about every four years, so the last bitcoin is expected to be mined around 2140.
Sources: en.wikipedia.org · bitcoin.org
🏙️ How tall is Tokyo Skytree, the broadcasting tower in Japan's capital?634 m
Its height was chosen so the number reads 'Musashi', the old name of the region around Tokyo, in Japanese wordplay.
Sources: en.wikipedia.org · en.tokyo-skytree.jp