Question

for what value of z, a number 21z5 is divided by 9​

Answer 1

Answer:

The X should be-1

Step-by-step explanation:

Because we add 2+1+1+5=9

It is divide by 9

Answer 2

Answer:

The answer is 1

Step-by-step explanation:

The divisibility rule of 9 is that the sum of the digits should be DIVISIBLE by  9. adding the digits in the number 21z5 we get 2+1+5+z= 9 or divisible by 9

therefore; 8+z is divisible by 9.

z can be only 1 and not any other value as it has to be single digit.

The answer is 1.

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