Question

if 31 z5 is a multiple of 9, where z is a digit, what is the value of z? you will find that there are two answer for the last problem. why is this so?

(gul molng) ​

Answer 1

Answer:

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Step-by-step explanation:

315z + 27* =z² j³

Answer 2

Answer:

3000+100+z(10)+5 =31z5

for 31z5 to be divisible by 9

3+1+z+5 = 9,18

9+z=9

z=0

or z=9

No = 3105 or 3195

there are two answers because 9 is the only number which can add up with another one digit n0. i.e 9 to make 18.

Step-by-step explanation:

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