Question

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

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Answer 1

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Divisibility Identity Of 9

➠ ab = a + b = WHICH Should Be divisional by 9

➠ 21y6 = 2 + 1 + y + 6 = 9 + y

➠ 9 Divides So

Y can Be

➠ 0 , 9

Answer 2

Answer :

Divisibility identity of 9.

➡️ab = a + b = which should be divisional by 9

➡️21y6 = 2 + 1 + y + 6 = 9y

➡️9 divides so,

y can be,

➡️0,9

hope it will help you ...