Question 230690
Here's what you do. 
The pattern is:
First add 1 to the first number which gives you 37. 
Then add 2 to 37 which gives you 39. 
Then add 3 to 39 which gives you 42. 
Then add 4 to 42 which gives you 46. 
Then add 5 to 46 which gives you 51. 
Now you know what to do next.

Your welcome, 
RJ Toftness
www.math-unlock.com