Question

The unit digit of a two-digit number is 3 and seven times the sum of the digit is the number itself •Find the number

Answer 1

Given; The unit digit of a two-digit number is 3 and seven times the sum of the digit is the number itself

To Find; the number

Solution It is given that The unit digit of a two-digit number is 3 and seven times the sum of the digit is the number itself

Let the unit digit be x and one digit be y then the number will 10y+x

According to question

x=3

7(x+y)=10y+x

7x+7y=10y+x

6x=3y

y=2x

y=6

So the number will be 60+3 that is 63

Hence the number is 63