7 chickens and 11 Rabbits - 7 X 2 (feet per chicken) plus 11 X 4 (feet per rabbit) equals 58
There are 5n chickens and 20-3n rabbits, for n = 1,2,3,4,5 or 6.
12 chickens 4 rabbits
Let's denote the number of chickens as C and the number of rabbits as R. We can write two equations based on the given information: C + R = 72 (total number of heads) and 2C + 4R = 200 (total number of feet). Solving these equations simultaneously, we find there are 50 chickens and 22 rabbits in the cage.
Suppose there are C chickens and R rabbits. Then Feet: 2*C + 4*R = 140 . . . . . (I) Heads: C + R = 50 . . . . . . . . (II) Equation (I) - Equation (II) gives: 2*C + 4*R - 2*C - 2*R = 140 - 2*50 or 2*R = 40 so that R = 20 and then, by (II), C + 20 = 50 so that C = 30. Answer: 20 rabbits and 30 chickens. This assumes, of course, that there are no headless chickens running around!
there are 80 goats and 20 chickens.
No, chickens do not have brains in their feet. Their brain is located in their head, just like most other animals. Chickens have a ganglion of nerves in their feet that help with reflex actions and movement control.
Here's a Perl script that will answer the problem for any number of heads and feet. sub how_many { print "Number of heads: "; chomp($h = ); print "Number of feet: ";chomp($f = ); $p = $h; $c = 0; while (($p*4 + $c*2) != $f) { $p--; $c++; } } &how_many; print "There are $p pigs and $c chickens.\n"; print "They have $h heads and $f feet.\n"; Number of heads: 27 Number of feet: 78 There are 12 pigs and 15 chickens. They have 27 heads and 78 feet.
9 sheeps and 18 chickens
Rabbits thump their feet to warn other rabbits of danger. Rabbits also sometimes thump their feet in anger or frustration.
12 rabbits 15 ducks
Let the number of chickens be x and the number of pigs be y. Each chicken has 1 head and 2 feet, while each pig has 1 head and 4 feet. We can then write the equations x + y = 48 (counting heads) and 2x + 4y = 124 (counting feet). Solving these equations simultaneously gives x = 24 and y = 24, so there were 24 chickens and 24 pigs.
It works out that there are 49 chickens and 15 cows Heads = 49+15 = 64 Feet = 2*(49)+4*(15) = 158