What is the next number of this series 27, 37, 47, _?

Answer: 57

Explanation: 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.