Question

Find the value of the letters in the following question.

   A  A
   ×  A 
C A  B

Answer 1

             A  A
Given,   ×  A 
          C A  B 

Here, AA × A is a three-digit number, whose unit’s digit is B, therefore A can take values from 4 to 9 as A = 0, 1, 2, 3 give a single digit or a two-digit number. 

Further, since ten’s digit of the product is A itself.

So, A cannot take values 4, 5, 6, 7 and 8.

Hence, A = 9 and then B = 1, C = 8.