Question

The sum of the digit of a two digit number is $15$ and the difference between the digits is $3$. What the two digit number?

• A. $69$
• B. $78$
• C. $90$
• D. $86$

Answer 1

Answer: (A)

$69$

Sum of digit of $2$ digit number $10x+y$ is $15$

$x+y=15$

is $3,x-y=3x+y=15x-y=3----2x=18x=9$

So, $y=15-x15-9y=6$

solution can be $96$ or $69$

Answer $A$