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What should come in place of the question mark (?) in the given series? 650 660 669 677 684 ?

A686

B688

C692

D690

Answer:

D. 690

Read Explanation:

Series: 650, 660, 669, 677, 684, ?

Step 1: Find the differences

Numbers

Difference

650 → 660

+10

660 → 669

+9

669 → 677

+8

677 → 684

+7

The pattern is decreasing by 1:
+10, +9, +8, +7, +6

Step 2: Add the next difference

684 + 6 = 690

Answer: 690


Related Questions:

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

Statements:

Some balls are toys.

All toys are plastic.

No plastic is water.

Conclusions:

(1): Some balls are plastic.

(Il): No toy is water.

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