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Indices, SM-Bank 056

Using divisibility tests, find the largest number less than 500 that is divisible by 9.   (2 marks)

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\(\text{A number is divisible by }9\ \text{if the sum of the digits is divisible by }9.\)

\(\text{Checking numbers less than } 500\)

\(499=4+9+9=22\ \Rightarrow\ \text{ not divisible by 9}\)

\(498=4+9+8=21\ \Rightarrow\ \text{ not divisible by 9}\)

\(497=4+9+7=20\ \Rightarrow\ \text{ not divisible by 9}\)

\(496=4+9+6=19\ \Rightarrow\ \text{ not divisible by 9}\)

\(495=4+9+5=18\ \Rightarrow\ \text{ divisible by 9}\ \checkmark\)

\(\therefore\ 495\ \text{is the largest number less than }500\ \text{that is divisible by }9.\)

Filed Under: Indices Tagged With: num-title-ct-core, smc-4214-25-Divisibility

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