Question

if 3x74 is a number divisible by 9, then find the least value of x

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Answer 1

$<font color="blue">Main Concept:In order to be divisible by 9 the sum of the no. should be multiple of 9.</font]$

In the above questions.

the sum is only 14

So, in order to be divisible by 9 we should add 4 to make it 18 .

which is divisible by 9

So, the value of X is 4

"""""""""" thns """""""""""

Answer 2

Answer:

4

Step-by-step explanation:

Since the the prime factors of 9 are 3 and 3. So we can use a very similar rule to determine if a number is divisible by 9.

Rule

Any integer which is divisible by 9 its sum of the digits is divisible by 9.

Solution

Sum of 3x74

3 + x + 7 + 4 = 14

but since 14 is not divisible by 9 so we will find the nearest multiple that is 18

18/9 = 2

so,

3 + 4 + 7 + 4 = 18