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


(a) 
69 
(b) 
78 
(c) 
96 
(d) 
Cannot be determined 
The sum of the digits of a twodigit number is 15 and the difference between the digits is 3. What is the twodigit number? 


(a) 
69 
(b) 
78 
(c) 
96 
(d) 
Cannot be determined 
Let the ten’s digit be and unit’s digit be
Then, and
Solving we get
Solving we get
So, the number is either 96 or 69.
Hence, the number cannot be determined.