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Find all possible values of x for which the number 7x3 is divisible by 3. Also, find each such number

Posted by Rohit Chauhan 6 years, 6 months ago

CBSE > Class 08 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

If 7x³has to be divisible by 3, Then 7 + x + 3 must be divisible by 3.
7 + x + 3 = 10 + x
We know x can only be a single digit number.
And multiples of 3 between 10 to 20 is 12 , 15, 18
We know that, 12 = 10 + 2, 15 = 10 + 5, 18 = 10 + 8.

0Thank You

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CBSE > Class 08 > Mathematics