Tiffany, Irene, Harry and Tina shared some pens. Tiffany and Irene took
15 of the total number of pens while Harry and Tina took the rest. Irene had twice as many pens as Tiffany and Tina had 40 pens. Given that Tina had twice as many pens as Irene, how many pens were there altogether?
Tiffany |
Irene |
Harry |
Tina |
Total |
1x3 |
4x3 |
5x3 |
1 |
2 |
|
|
|
|
1x2 |
|
2x2 |
|
1 u |
2 u |
8 u |
4 u |
15 u |
Number of pens that Irene had is repeated. Make the number of pens that Irene had the same. LCM of 2 and 1 is 2.
Number of pens that Tina had = 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
Total number of pens
= 15 u
= 15 x 10
= 150
Answer(s): 150