A number of two digits had 3 for its unit’s digit, and the sum of the digits is of the number itself. The number is 


(a) 
43 
(b) 
53 
(c) 
63 
(d) 
73 
A number of two digits had 3 for its unit’s digit, and the sum of the digits is of the number itself. The number is 


(a) 
43 
(b) 
53 
(c) 
63 
(d) 
73 
Let the ten’s digit be
Then, number = and sum of digits
So,
Hence, the number is 63.