Find the values of the letters in the following and give reasons for the steps involved. AB × 5 = CAB

As B × 5 = B, B has to be either 5 or 0. If B = 0, then A × 5 = A. So, A = 5, B = 0 and C = 2. If B = 5, then A × 5 with carry over ends with A. Hence, A = 2, B = 5, C = 1.