Question

find all possible value of x for which the number 7x3 is divisible by 3. also, find each such number​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

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Here, our given number is 7x3, which is divisible by 3.

We know that if number is divisible by 3 only when sum of digits of given number is divisible by 3.

Hence, if 7x3 is divisible by 3, then,

7 + x + 3 = 0, 3, 6, 9,12,…

∴ 10 + x = multiple of 3.

Hence, x = (multiple of 3) – 10

Here, possible values for multiples of 3 are 12, 15 and 18

Hence, x = 2, 5 or 8

Hence, possible numbers are 723, 753 and 783

Step-by-step explanation: