Explanation:

Let's try to find the logic in the series:

58, 117, 237, 479, 965, ?

- First, let’s look for the pattern by subtraction:

- 117 - 58 = 59

- 237 - 117 = 120

- 479 - 237 = 242

- 965 - 479 = 486

- Notice that the differences double each time (almost): 59, 120, 242, 486

- Now check next difference:

- Each term (after first) ˜ previous term × 2 + 1 or +2

- 58 × 2 + 1 = 117

- 117 × 2 + 3 = 237

- 237 × 2 + 5 = 479

- 479 × 2 + 7 = 965

- Pattern: Multiply by 2, then add increasing odd numbers (1, 3, 5, 7, next should be 9)

- Next number should be:

- 965 × 2 + 9 = 1930 + 9 = 1939

- Now, let’s check the options:

- Option 1: 1939

- Option 2: 1930

- Option 3: 1929

- Option 4: 1940

Correct answer is:

Option 1: 1939