Question

The sum of the digits of a 2-digit number is 9.
If the tens digit is half of the ones digit, find the
2-digit number

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Answer 1

Step-by-step explanation:

Let the two digits number is xy.

Here, Unit Digit = y and Tenth Digit = x

Given x + y = 9 ——————— ( 1 )

and y = x/2

=> 2 y = x ——————— ( 2 )

Substituting value of “ x “ in equation ( 1 ), we have

2 y + y = 9

=> 3 y = 9

=> y = 9 / 3

=> y = 3

=> x = 2 y

Substituting value of “ y “ in equation ( 2 ), we have

=> x = 2 y

=> x = 2 ( 3 )

=> x = 6