Adam has a total of 14 geese and donkeys.
The number of donkeys' legs is 32 more than the geese' legs.
How many (a) geese and (b) donkeys does Adam have?
Number of donkeys |
Number of donkeys' legs |
Number of geese |
Number of geese' legs |
Number of more donkeys' legs than geese' legs |
14
|
14 x 4 = 56 |
0 |
0 x 2 = 0 |
56 - 0 = 56 |
13 |
13 x 4 = 52 |
1 |
1 x 2 = 2 |
52 - 2 = 50 |
10 |
10 x 4 = 40 |
4 |
4 x 2 = 8 |
40 - 8 = 32 |
(a)
If Adam has 14 donkeys,
the number of legs
= 14 x 4
= 56
If Adam has 13 donkeys and 1 goose,
number of more donkeys' legs than geese' legs
= 13 x 4 - 1 x 2
= 52 - 2
= 50
Decrease in the number of legs when 1 donkey is replaced by 1 goose
= 56 - 50
= 6
Total decrease in the number of legs
= 56 - 32
= 24
Number of geese
= 24 ÷ 6
= 4
(b)
Number of donkeys
= 14 - 4
= 10
Answer(s): (a) 4; (b) 10