Question

Q.6 SHORT ANSWER TYPE QUESTION-
1. Find all value of z for which the number 471z8 is divisible by 9. Also find the number​

Answer 1

$\bf\large\underline\pink{Answer:-}$

A number is divisible by 9 when the sum of its digit is divisible by 9

4+7+1+z+8 =20 +z

the closest multiple of 9 to 20 is 27

Therefore

20+z =27

z =27-20

z = 7.

Answer 2

$\huge\star\mathfrak\blue{{Answer:-}}$

A number is divisible by 9 when the sum of its digit is divisible by 9

4+7+1+z+8 =20 +z

the closest multiple of 9 to 20 is 27

Therefore

20+z =27

z =27-20

z = 7