test the devisibility of the following number by 9 and 11
(a) 8569
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Step-by-step explanation:
1) 8+5+6+9 = 28, which is not divisible by 9.
:. 8569 is not divisible by 9
2) {8+6} - {5+9}
= (14 - 14) = 0
:. 0 is divisible by 11, therefore, 8569 is also divisible by 11.
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