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18 June, 17:46

Test 24,515 for divisibility by 2, 3, 5, 9, or 10.

a. It is not divisible by any of the numbers.

b. 5, 2

c. 5, 2, 9

d. 5

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Answers (1)
  1. 18 June, 17:59
    0
    D

    Step-by-step explanation:

    1. When a number is divisible by 2 it must end with even digit 0, 2, 4, 6 or 8.

    So the number 24,515 is not divisible by 2.

    2. When a number is divisible by 5 it must end with digit 0, or 5.

    The number 24,515 ends with 5 so it is divisible by 5.

    3. When a number is divisible by 3, the sum of all digits must be divisible by 3.

    The sum of all digits of the number 24,515 is 2+4+5+1+5=17. 17 is not divisible by 3, so the number 24,515 is not divisible by 3.

    4. When a number is divisible by 9, the sum of all digits must be divisible by 9.

    The sum of all digits of the number 24,515 is 2+4+5+1+5=17. 17 is not divisible by 9, so the number 24,515 is not divisible by 9.

    5. When a number is divisible by 10 it must end with digit 0.

    The number 24,515 ends with 5 so it is not divisible by 10.
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