Some hens and horses are in a farm. These animals have a total of 17 heads and 52 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 |
17
|
17 x 4 = 68 |
0
|
0
|
68 |
16
|
16 x 4 = 64 |
1
|
1 x 2 = 2 |
66
|
9 |
9 x 4 = 36 |
8
|
8 x 2 = 16 |
52
|
Number of legs if all are horses
= 17 x 4
= 68
Big difference between the number of legs of the horses and the hens
= 68 - 52
= 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
= 17 - 8
= 9
Answer(s): (a) 8; (b) 9