If 31y4 is a multiple of 9, where y is a digit, what is the value of y?
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Answer:
1
Step-by-step explanation:
In 31y4,
=> 3 + 1 + y + 4 = divisible by 9
=> 8 + y = divisible by 9
=> 8 + 1 = 9 = divisible by 9
Clearly, if the value of y is 1 then, it will be a multiple of 9.
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