Question

fill in the blanks . If 21 y5 is a multiple of 9 then the value of y= _
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Answer 1

Answer:

y = 1

Step-by-step explanation:

To be a multiple of 9 the sum of the digits should be a multiple of 9,

so 2+1+y+5 = 9

8+y = 9

so  y can be 1