(a) A student is curious about the test for d ivisibility by 9 and asks you to prove it for any three digit number. How do you do it? (b) Are there single-digit values for a and b that make the number 4324a5b4 divisible by both 4 and 9? If so, what a re they? If not, why not?
(a) A student is curious about the test for d ivisibility by 9 and asks you to prove it for any three digit number. How do you do it? (b) Are there single-digit values for a and b that make the number 4324a5b4 divisible by both 4 and 9? If so, what a re they? If not, why not?
Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter11: Rational And Irrational Numbers
Section11.8: Adding And Subtracting Radicals
Problem 1E
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(a) A student is curious about the test for d ivisibility by 9 and asks you to prove it for any three digit number. How do you do it?
(b) Are there single-digit values for a and b that make the number 4324a5b4 divisible by both 4 and 9? If so, what a re they? If not, why not?
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For (a), could you please provide a generic proof for ANY 3-digits number?
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