Question
Irene read a book from Thursday to Saturday. Every day, she read 20 more pages than the day before. She read 75 pages on Saturday. How many pages of the book did Irene read from Thursday to Saturday altogether?
2 m

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Irene read a book from Thursday to Saturday. Every day, she read 20 more pages than the day before. She read 75 pages on Saturday. How many pages of the book did Irene read from Thursday to Saturday altogether?