Question

In a two digit number the sum of the
two digits is 8, if 18 is added to the
number its digits are reversed, then the
number is
A
30
B
25
C 35
D 20​

Answer 1

Answer:

Let one digit of the number be x , then its ten digits will be (8-x).

so,given number =10(8-x)+x

=80-10x+x

=80-9x

Now if digits are reversed , then Number obtained

=10x +(8-x)

=10x+8-x

=9x + 8

According to question

(80-9x)+18=9x+8

98-9x=9x+8

90=18x

x=5

=) given number =80-9x

=80-45(9 multiply by 5 , because

x=5)

=35

therefore, the number is 35

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