What should come in place of the question mark 39 39 in the following number series 600 590 610 580 ...........

Logical Reasoning (RBI) Number series

What should come in place of the question mark '?' in the following number series?

600, 590, 610, 580, 620, ?

This questions was previously asked in

RBI Grade B (9 November 2019)

560

570

565

575

540

- The series alternates between decreasing and increasing:

- 600 decreases by 10 to 590.

- 590 increases by 20 to 610.

- 610 decreases by 30 to 580.

- 580 increases by 40 to 620.

- 620 should decrease by 50 to reach the next number.

- Therefore, the number after 620 should be 570.

- So, the option matching is:

- Option 1: 560

- Option 2: 570

- Option 3: 565

- Option 4: 575

- Option 5: 540

- Hence, the correct answer is Option 2: 570.

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