Q1. Find the values of the letters in each of the following and give reasons for the steps involved.

                                                                                                                                                                          

Answers (1)

Here we are adding two numbers and unit place of the first number and the second number is A and  5 respectively. unit place of the answer is 2 so the way we can get this result is when we get 12 on adding unit places of both number i.e.

                                                            A + 5 = 12

                                which implies      A = 12 - 5 = 7.

Ten's digit of both numbers are 3 and 2.remainder=1

          so ten's digit of the answer(B) = 3 + 2 + 1 = 6

 

Hence A= 7 and B = 6.

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