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The challenge for Tuesday, September 22, 2026

The four questions from that day on GutGuesser. The answers aren't here: you find them by playing.

1.Tokyo is the biggest urban area in the world. How many people live there?

World · Source: Naciones Unidas

2.How much weight does a blue whale calf put on in a day?

Animals · Source: Biología de Balaenoptera musculus

3.How many cars are there in the world?

Transport · Source: Estimaciones del parque automovilístico mundial

4.What percentage of the air is oxygen?

Nature · Source: Composición de la atmósfera seca

Think you'd get close?

We don't publish the answers. Every day there are four new questions, one minute, and whoever gets closest wins.

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