Explanation:

Let's break this sequence down:

- The numbers go: 600, 590, 575, 550, 510, ?

- First, find the difference between each pair:

- 600 - 590 = 10

- 590 - 575 = 15

- 575 - 550 = 25

- 550 - 510 = 40

- Let's look at those differences: 10, 15, 25, 40.

- Notice anything? Each jump increases: 10 to 15 (+5), 15 to 25 (+10), 25 to 40 (+15).

- The increase pattern is +5, +10, +15. Following that trend, the next jump should add +20 to 40, which is 60.

So, next difference should be 60.

- Subtract 60 from 510:

510 - 60 = 450

Here’s what this really means:

- Option 1 (460): off by 10

- Option 2 (450): the perfect fit

- Option 3 (440): too low

- Option 4 (420): way off