Some ducks and buffaloes are in a farm. These animals have a total of 19 heads and 58 legs.
- How many buffaloes are there?
- How many ducks are there?
Number of buffaloes |
Number of buffaloes' legs |
Number of ducks |
Number of ducks' legs |
Total legs |
19
|
19 x 4 = 76 |
0
|
0
|
76 |
18
|
18 x 4 = 72 |
1
|
1 x 2 = 2 |
74
|
10 |
10 x 4 = 40 |
9
|
9 x 2 = 18 |
58
|
Number of legs if all are buffaloes
= 19 x 4
= 76
Big difference between the number of legs of the buffaloes and the ducks
= 76 - 58
= 18
Small difference between the number of legs of one buffalo and one duck
= 4 - 2
= 2
Numbers of ducks
= 18 ÷ 2
= 9
(b)
Number of buffaloes
= 19 - 9
= 10
Answer(s): (a) 9; (b) 10