Some hens and horses are in a farm. These animals have a total of 18 heads and 56 legs.
- How many horses are there?
- How many hens are there?
Number of
horses |
Number of
horses' legs |
Number of
hens |
Number of
hens' legs |
Total legs |
18
|
18 x 4
= 72 |
0
|
0
|
72 |
17
|
17 x 4
= 68 |
1
|
1 x 2
= 2 |
70
|
| 10 |
10 x 4
= 40 |
8
|
8 x 2
= 16 |
56
|
Number of legs if all are horses
= 18 x 4
= 72
Big difference between the number of legs of the horses and the hens
= 72 - 56
= 16
Small difference between the number of legs of one horse and one hen
= 4 - 2
= 2
Numbers of hens
= 16 ÷ 2
= 8
(b)
Number of horses
= 18 - 8
= 10
Answer(s): (a) 8; (b) 10
