Two times a 2 digit/number is 9 times tge number obtained by reversing the digits and sum of digit is 9 . the num is
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digits= x and y.. number is=10x+y ..(ex.36=10*3+6)reversed no. is=10y+x..ATQ sum of digits === x+y=9..........1 2(10x+y)=9(10y+x)...=20x+2y=90y+9x....=90y-2y=20x-9x..=88y=11x....8y=x.....2..substituting value of x from 2 in 1..8y+y=9...9y=9..y=1.....3substituting value of y from 3 in 2..x=8..number=81.. reversed no.=18
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