Whenever Zoe practises the cello she improves. Zoe did not improve this week. Which statement must be true?

Answer and explanation

Correct answer: B. Zoe did not practise this week.

  1. Step 1: Practice always leads to improvement. Step 2. There was no improvement, so there cannot have been any practice. Answer: Zoe did not practise this week. Why not the others: Zoe practised but made no progress.: This contradicts the rule that practice always leads to improvement. Zoe practised twice as much as usual.: This is not supported and would also bring improvement. Zoe will improve next week.: This is not supported by the statements.

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Whenever Zoe practises… | Independent School Entrance (ISEB Pre-Test and 11+ CEM style)