Question
18. Which part of must be added to it so the result will be
Solution
4

1
=
1

=
18. (1) Let required part be
Then, according to the question,
4 15 4
I x 7 7 74  7x 14 7
42 _ 15 8
 14 7 Z  14 14
→ 4  15  8 7
7x 14 14
177_7
x 14 4
Thus, the required part is
8

=

X
0