Choose the correct number that completes the given series. 20, 110, 210, 320,…

To find the missing number in the series 20, 110, 210, 320, ___, 570, 710, we must analyze the differences between consecutive terms.

Step-by-Step Analysis
Examine the transitions:

110 - 20 = 90

210 - 110 = 100

320 - 210 = 110

Identify the pattern:

The difference between the numbers is increasing by 10 each time (90, 100, 110).

Following this logic, the next difference must be 120.

Calculate the missing term:

320 + 120 = 440.

Verify the sequence:

440 + 130 = 570 (This matches the next term in the series).

570 + 140 = 710 (This matches the final term in the series).