Question

"Question 8 Find the values of the letters in the following and give reasons for the steps involved.

A 1
+ 1 B
__________
B 0
__________

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.

==========================================================

Solution

Put B = 9, we get 9 + 1 = 10

Put 0 at ones place and carry over 1, we get

For A = 7

 7 + 1 + 1 = 9

Hence, A = 7 and B = 9

   A 1
+ 1 B
__________
   B 0 
__________


   7 1
+ 1 9
__________
   9  0 

__________

==========================================================

Hope this will help you..