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What should come in place of the question mark (?) in the given series? 127, 257, 407, 577, 767, ?
Question

What should come in place of the question mark (?) in the given series?
127, 257, 407, 577, 767, ?

A.

977

B.

877

C.

957

D.

817

Correct option is A

Given: 127, 257, 407, 577, 767, ?
Logic: The series increases with a pattern of adding 20 more than the previous difference:
+130, +150, +170, +190, +210
Let's solve it: 
127 + 130 = 257
257 + 150 = 407
407 + 170 = 577
577 + 190 = 767
So, the next number is 767 + 210 = 977
Thus, the correct option is (a) 977.
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