Q10. Find the values of the letters in each of the following and give reasons for the steps involved.

Answers (1)

The addition of A and B is giving a number whose ones digit is 9. The sum can only be 9 not 10 as a sum of two single digits cannot exceed 18. hence there will not be any carry for the next step 

2 + A = 0 

implies A = 8 

2 + 8 = 10 and 1 is the carry for next step.

1 + 1 + 6 = A = 8 

it satisfies hence A = 8 and B = 1 is the correct answer.

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