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It's the semi-final in this week-long competition and the eight remaining competitors face two of the toughest rounds yet with Advanced Language and a sudden-death Spelling test.
It's the quarter-final in this week-long competition to find Britain's brightest child and quizmaster Richard Osman tests the remaining 11 kids on Science and Memory.
The five finalists face two demanding rounds, including a quick-fire buzzer session, as they bid to be crowned Child Genius of 2017.