Question

What should come in place of the question mark (?) in the given series? 789 790 780 782 772 775 765?

• A. 770
• B. 755
• C. 759
• D. 768

Answer 1

Answer:

C. 759

Let’s look at the pattern:

Series: 789, 790, 780, 782, 772, 775, 765, ?

Split into alternating operations

We observe two interleaving patterns:

Odd positions:

789 → 780 → 772 → 765
Changes:

• 789 − 9 = 780

• 780 − 8 = 772

• 772 − 7 = 765

So pattern: −9, −8, −7, −6

Next odd term is:
765 − 6 = 759

Even positions (just for confirmation):

790 → 782 → 775

• −8, −7 (consistent decreasing pattern)

  Final term

The next term continues the odd-position pattern.

Final Answer: 759