Explanation :

Eq1 : 20+20+20=60

Eq2: 20+3+3=26

Eq3: 3+6+6=15

Eq4:

one hen = 20

4 eggs=4

4 bananas = 4

So now putting all this in equation

20+4*4 =?

applaying BODMAS…

20+(4*4)=?

20+16=36

Correct answer : 36

By using arithmetic progression (AP) series logic formula

a,a+d,a+2d,a+3d,……….

In this question, a =27

d – difference between the first and second number

d= 37- 27=10

We find out the fourth number,

a +3d = 27 + 3(10)

a + 3d = 27+ 30

a + 3d = 57

So 57 is the next term in the series.