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### Primary 6 Problem Sums/Word Problems - Try FREE

- Ratio: Think units and you're on your way! > Ratio Exercise 9 > 4
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**Question
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In an examination, Sally started solving the questions from paper A while Charlie started solving the questions from paper B.

If Sally solves 16 questions per half hour and Charlie solves 4 questions per half hour, 23 questions in paper A will be left unsolved by Sally by the time Charlie solves all his questions.

If Charlie solves 16 questions per half hour and Sally solves 8 questions per half hour, 163 questions in paper A will be left unsolved by the time Charlie solves all his questions.

If both papers have different number of questions , how many more questions are there in paper A than paper B?

**143**