1] A man has some hens and cows.If the number of heads be 48 and the number of feet equals 140.Then the number of hens will be
a]22 b]23 c]24 d]26

let the number of hens be x
let the number of cows be y

x+y= 48
2x + 4y = 140 = > x+2y = 70

x+y= 48
x+2y = 70
-------------
y = 22

x+22 = 48
x = 26

2] There are deer and peacocks ina  zoo.By counting the heads they are 80.The number of their legs is 200.How many peacocks are there?
a]60 b]63 c]64 d]66


2] There are lions and parrots in a  zoo.By counting the heads they are 15.The number of their legs is 50.How many lions are there?
a]10 b]13 c]14 d]16