Question

Find the value of z for which the number 471z8 is divisible by 9 also find the number

Answer 1

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Answer 2

Answer:

The  required value of Z is 7.

Step-by-step explanation:

As per the question,

We need to make the given number divisible by 9 by placing a digit in place of z.

As we know,

• Divisibility test of 9: We know that a number is divisible by 9 when the sum of the digits of the number is also divisible by 9.
• So we will be using the same formula here and first calculate the sum of the digits of the given number.
• The sum of the digits are : 4+7+1+Z+8 = 20+Z
• Now we will find the the single digit closest value of Z so that the number is divisible by 9.
• As we know the clossest number here divisivle by 9 is 27.
• Hence,

20+Z = 27

Z = 27-20

Z= 7

The  required value of Z is 7.

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