Look at this series: 2, 30, 130, 350....... What number should come next?

This series seems to be increasing in a pattern that isn't immediately obvious. However, if we look at the differences between the numbers, we might be able to spot a pattern.

The difference between 30 and 2 is 28. The difference between 130 and 30 is 100. The difference between 350 and 130 is 220.

Now, let's look at the differences between these differences:

The difference between 100 and 28 is 72. The difference between 220 and 100 is 120.

So, the differences between the differences are increasing by 48 each time (72 - 24 = 48, 120 - 72 = 48).

If we continue this pattern, the next difference between the differences should be 120 + 48 = 168.

So, the next difference in the original series should be 220 + 168 = 388.

Therefore, the next number in the series should be 350 + 388 = 738.