find the value of y for which 3 digit number 3z1 is divisible by 9
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Step-by-step explanation:
Since, 3x1 is divisible by 9, the sum of its digits i.e. 3+x+1
should be divisible by 9.
Thus, (4+x) should be divisible by 9.
This is possible when 4+x=9 or 18.
Since x is a single digit number,
⇒4+x=9
⇒x=5
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