A no consists of two digits whose Sun is 8. If 18 is added to the number it's digits are reversed .find the number
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ans 35
let one's digit no =y
ten's digit no =x
AtQ , x+y = 8------------(eq.1)
and original no= 10x+y
10x+y +18 = 10y+x---(eq.2)
9x-9y =-18
x-y=-2
by eqn .1 and 2
x=3
y=5
required no = 35
let one's digit no =y
ten's digit no =x
AtQ , x+y = 8------------(eq.1)
and original no= 10x+y
10x+y +18 = 10y+x---(eq.2)
9x-9y =-18
x-y=-2
by eqn .1 and 2
x=3
y=5
required no = 35
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