0.1, 0.5, 0.9, 1.3, ?

Given:

0.1, 0.5, 0.9, 1.3, ?

To find:

The pattern

 Solution:

 Given numbers follows the following pattern. 

0.5 – 0.1 = 0.4

 0.9 – 0.5 = 0.4 

1.3 – 0.9 = 0.4 

Here, the difference between a number and its previous number is the same or we can say that each number is obtained by adding 0.4 to its previous number. So, the next number after 1.3

 = 1.3 + 0.4 

= 1.7
Therefore, the correct option is A