Avatar - Brandon Lee Easterday
Brandon Lee Easterdayadded this to Interesting
Can you solve it? Are you in the smartest 10 per cent?

Can you solve it? Are you in the smartest 10 per cent?

The Guardian - Alex Bellos

As UK students sit their A-levels, here’s a ‘simple’ puzzle that once stumped nine out of ten 18-year-olds around the world

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