Question
Mrs Japheth bought 23 kg of sugar. She used some sugar to mix in a tart and had 512 kg of sugar left. How much sugar did Mrs Japheth use to mix in a tart?
3 m

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Mrs Japheth bought 23 kg of sugar. She used some sugar to mix in a tart and had 512 kg of sugar left. How much sugar did Mrs Japheth use to mix in a tart?