Question

What should come in place of the question mark (?) in the given series? 1001 1000 998 995 991 ?

• A. 986
• B. 984
• C. 987
• D. 989

Answer 1

Answer:

A. 986

Series:
1001, 1000, 998, 995, 991, ?

1001 → 1000 = −1
1000 → 998 = −2
998 → 995 = −3
995 → 991 = −4

The pattern is subtracting consecutive natural numbers:

−1, −2, −3, −4

So next should be:

−5

991 − 5 = 986