Penelope, Sarah and Lynn have 112 stamps. Penelope has
34 as many stamps as Sarah. Lynn's stamps is
13 of the total number of Penelope's and Sarah's stamps. How many stamps must Sarah give to Lynn so that both Penelope and Lynn will have the same number of stamps?
| Penelope |
Sarah |
Lynn |
Total |
3x7 =
21 u |
1x7 =
7 u |
|
3x3 =
9 u |
4x3 =
12 u |
|
|
| 9 u |
12 u |
7 u |
112 |
Total number of stamps
= 9 u + 12 u + 7 u
= 28 u
28 u = 112
1 u = 112 ÷ 28 = 4
| Penelope |
Sarah |
Lynn |
Total |
| 9 u |
12 u |
7 u |
112 |
| |
- 2 u |
+ 2 u |
|
| 9 u |
10 u |
9 u |
112 |
Number of stamps that Sarah must give to Lynn
= 9 u - 7 u
= 2 u
= 2 x 4
= 8
Answer(s): 8
