# Question: What is the next number of this number sequence 27, 37, 47, _ Puzzle

##### Show me Answer

**Correct Answer: 57**

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.**

Also read: Five Sisters in a Room Puzzle Riddle