Question

if 21y6 is a multiple of 9 where y is a digit what are the values of y?

Answer 1

Answer:

Property:

If a number should be divisible by nine, then the sum of the digits must be divisible by nine.

According to the property:

2 + 1 + y + 5 = Multiples of nine

=> 8 + y = 9 (suppose, because y must be 1 digit)

therefore y = 1 only.

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Step-by-step explanation:

Answer 2

Answer:

property:

If a number should be divisible by nine, then the sum of the digits must be divisible by nine.

According to the property,

2 + 1 + y = Multiples of nine

➡️ 8 + y = 9 ( suppose, because y must be 1 digit)

therefore, y = 1 only.

Hope it will help you...