Tina, Barbara, Seth and Opal shared some stamps. Tina and Barbara took
13 of the total number of stamps while Seth and Opal took the rest. Barbara had four times as many stamps as Tina and Opal had 40 stamps. Given that Opal had twice as many stamps as Barbara, how many stamps were there altogether?
Tina |
Barbara |
Seth |
Opal |
Total |
1x5 |
2x5 |
3x5 |
1 |
4 |
|
|
|
|
1x4 |
|
2x4 |
|
1 u |
4 u |
2 u |
8 u |
15 u |
Number of stamps that Barbara had is repeated. Make the number of stamps that Barbara had the same. LCM of 4 and 1 is 4.
Number of stamps that Opal had = 8 u
8 u = 40
1 u = 40 ÷ 8 = 5
Total number of stamps
= 15 u
= 15 x 5
= 75
Answer(s): 75