Question

"Question 4 Find the values of the letters in the following and give reasons for the steps involved.

A B
+ 3 7
__________
6 A
__________

Class 8 Playing with Numbers Page 256"

Answer 1

Numbers can be written in general form. Hence, a two digit number ab will be written as ab = 10a + b.

The general form of numbers is helpful in solving puzzles or number games.

Rules to be followed while solving the puzzles:. Each letter in the puzzle must stand for just one digit. Each digit must be represented by just one letter. 2. The first digit of a number cannot be zero.

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Solution

Here, B = 5

so  7 + 5 = 12.

Put 2 at ones place and carry over 1 & A = 2, we get

2 + 3 + 1 = 6

Hence, A = 2 & B = 5

   A B
+ 3 7
__________
  6 A 
__________



   2 5
+ 3 7
__________
   6 2
__________

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Hope this will help you..