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11 votes
11 votes
Find the value of a so that the number 215a4 is divisible by 3​

User Tragamor
by
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1 Answer

11 votes
11 votes

Answer:

a = 0, 3, 6, 9

Explanation:

The divisibility rule for 3 is that the sum of the digits is equal to a number that is divisible by 3.

Example

67821 is divisible by 3 because 6 + 7 + 8 + 2 + 1 = 24, which is evenly divisible by 3.

We have 2 + 1 + 5 + a + 4 = a number divisible by 3

2+1+5+4 = 12.

Therefore, a can equal 0, 3, 6, or 9.

Hope this helped!

Have a nice day :)

User Caseyboardman
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3.4k points
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