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if 21y5 is a multiple of 9,where y is a digit,what is the value ofy?

The sum of digits of a multiple of 9 must be equal to 9
Therefore 2+1+y+5 = 9
y = 9-2-1-5
y=1
The value of y = 1

  • 4
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 The sum of digits of a multiple of 9 must be equal to 9 
Therefore 2+1+y+5 = 9 
y = 9-2-1-5
y=1
The value of y = 1

  • 7

The sum of digits of a multiple of 9 must be equal to 9 
Therefore 2+1+y+5 = 9 
y = 9-2-1-5
y=1
The value of y = 1

  • 4
If 21y5 Is a multiple of 9 where t is a digit , find the value of y
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