Number of Outcomes

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How many 3 digit numbers can be created using the digits 0-9, if the first digit must be a perfect square and each digit can only be used once?

How many 3 digit locker combinations can be created using the numbers 0-20 if each number can be used more than once?

How many ways can Jenny arrange 4 dolls in her doll house?

If ten people are in a race, how manhy ways can you choose the first, second, third, and fourth place finishers?

Three students are to be choosen from the group of six to fill the positions of president, vice president, and secretary. In how many ways can this be accomplished?

Mr. White gave his students a study guide with 15 questions. How many different ways can he choose 10 questions for the test?

How many ways can 6 students sign out when leaving the library?

How many ways are there to answer 4 true and false questions?