Question
Fabian was supposed to arrange some chairs for a concert in the school hall. If he formed 12 rows of 9 chairs, he would be left with 5 remaining chairs. How many more chairs would he need in order to form 10 rows of 15 chairs?
4 m

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Fabian was supposed to arrange some chairs for a concert in the school hall. If he formed 12 rows of 9 chairs, he would be left with 5 remaining chairs. How many more chairs would he need in order to form 10 rows of 15 chairs?