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CBSE Class 10 Answered

Hello Sir, Please clear my doubt: The sum of the digits of a two digit number is 9. Also 9 times the number is twice the number obtained by reversing the digits. Find the number.    
Asked by seeni2005 | 27 Jun, 2019, 08:46: PM
answered-by-expert Expert Answer
Let x be the digit at unit place and y be the digit at ten's place.
According to the question,
x + y = 9 ....(i)
9(x + 10y) = 2(y + 10x)
x - 8y = 0 ....(ii)
Solving (i) and (ii) we get x = 8 and y = 1 
Hence, the number is 18.
Answered by Sneha shidid | 28 Jun, 2019, 09:10: AM

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