Flynn and Perry have some silver pens and some red pens. The number of red pens Flynn has is equal to the number of silver pens Perry has.
34 of Flynn's pens are silver and
13 of Perry's pens are red. There are a total of 40 silver pens. Find the total number of pens they have.
| Flynn |
Perry |
Total |
| Silver |
Red |
Silver |
Red |
|
| |
1x2 |
1x2 |
|
|
| 3x2 |
1x2 |
2x1 |
1x1 |
|
| 6 u |
2 u |
2 u |
1 u |
11 u |
The number of Flynn's red pens and Perry's silver pens is the same.
The number of Flynn's red pens is repeated. The number of Perry's silver pens is repeated. Make the number of Flynn's red pens and Perry's silver pens the same. LCM of 1 and 4 is 2.
Number of silver pens
= 6 u + 2 u
= 8 u
8 u = 40
1 u = 40 ÷ 8 = 5
Total number of pens
= 6 u + 2 u + 2 u + 1 u
= 11 u
= 11 x 5
= 55
Answer(s): 55
