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The combination locks at a school have the numbers from 0 to 39 (inclusive). A locker combination consists of three different numbers, where the order matters. Because of the way the locks are manufactures, all three numbers are even or all three numbers read more ..

thanksforthehelp Jun 3, 2021

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How many multiples of 9 are between 100,000 and 100,185?

thanksforthehelp Jun 3, 2021

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1. A teacher arranged her books on a shelf. She has 4 astronomy books, 3 Biology books, and 2 Chemistry books. How many ways can she arrange these books on the shelf if the books from each subject must be together?

2. How many ways read more ..

thanksforthehelp Jun 2, 2021

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1. Of 35 students in my class, 11 do karate, 11 play piano, and 20 do tennis. 4 students play piano and do tennis, 3 students do karate and play piano, 5 students do tennis and practice karate, and 3 student do none of these. How many students do all 3? read more ..

thanksforthehelp Jun 2, 2021