elect any two-digit number. Multiply it by 9 . Then add the digits. Keep adding the digits in the answer until you get a single-digit answer. Using inductive reasoning, what can you conjecture about any whole number multiplied by 9

College Algebra
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ISBN:9781938168383
Author:Jay Abramson
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Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 35SE: The set, S consists of 900,000000 whole numbers, each being the same number of digits long. How many...
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Select any two-digit number. Multiply it by 9 . Then add the digits. Keep adding the digits in the answer until you get a single-digit answer. Using inductive reasoning, what can you conjecture about any whole number multiplied by 9 ? Use deductive reasoning to prove that your conjecture
is true.

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