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