Yesterday, there were four times as many ducks as geese on a farm. Today, 22 ducks are sold. There are thrice as many geese now. Find the total number of geese and ducks on the farm yesterday.
| |
Ducks |
Geese |
Total |
| Before |
4x3 =
12 u |
1x3 =
3 u |
15 u |
| Change |
- 22 |
|
|
| After |
1 u |
3 u |
|
The number of geese at first and in the end remains unchanged. Make the number of geese the same. LCM of 1 and 3 is 3.
Number of ducks sold
= 12 u - 1 u
= 11 u
11 u = 22
1 u = 22 ÷ 11 = 2
Total number of geese and ducks yesterday
= 12 u + 3 u
= 15 u
= 15 x 2
= 30
Answer(s): 30
