Question
Irene read a book from Monday to Thursday. Every day, she read 13 more pages than the day before. She read 86 pages on Thursday. How many pages of the book did Irene read from Monday to Thursday altogether?
2 m

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Irene read a book from Monday to Thursday. Every day, she read 13 more pages than the day before. She read 86 pages on Thursday. How many pages of the book did Irene read from Monday to Thursday altogether?