Se Page : Date: / / The sum of the digits of a two number is a. Also, nine times this number is twice the number obtained by reversing the order of the digits. Find the number
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Let the ten's digit no. be x and one's digit no. be y.
So the no. will be = 10x+y.
Given : x+y=9-----(I)
9(10x+y)=2(10y+x) ⇒88x−11y=0 -----(II)
On solving I and II simultaneously you will get x=1 and y=8.
Therefore your desired no. is 18.
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