The tens digit of a number is three time the unit digit. The sum of the digit in the number is fine the number
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QUESTION - The ten’s digit of a two digit number is three times the unit digit. The sum of the number and the unit digit is 32 . Find the number.
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let unit digit be= x then
ten's digit =3x
sum of the number =[10{3x}+1{x}]
sum of the number and the unit digit=32
[10{3x}+x]+x=32
30x+x+x=32
x=1
so,by putting the value of x we get
ten's digit =3
unit digit=1
so the number is 31
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