Question

if 243243 x is divisible by both 5 and 10 what is the value of the digit x ?
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Answer 1

0 is the digit.

hope it helps you.......

Answer 2

If the three digit number 24x is divisible by 9 what is the value of x?

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To be able to understand the solution for this question, we need to know about the divisibility of the number 9.

DIVISIBILITY OF THE NUMBER 9:

It states that “a number divisible by 9 should have the sum of its digits equal to a multiple of 9”.

For example: Sum of the digits of the number 585 is 5+8+5=18 and 18 is a multiple of 9. Therefore, 585 will be divisible by 9. We can check this statement to be true because 9×65=585 .

Now, here in this question we know that 24x is divisible by 9. So, the relation between the digits and multiple of 9 will be:

Let m be a factor of the multiple of 9.

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What value of digit ‘x’ is ‘31x5’ divisible by ‘3′?

divisibility criteria of a number that is divided by 9:-

sum of digits of that number should be divisible by 9.

here number is represented as 24x

so the sum will be 2+4+x i.e 6+x

6+x may be 9,18,27…

since x is a single digit.

so 6+x=9

x=9–6=3

hence the value of x will be 3.

correct me if i am wrong!!