In the given number series, determine the next term: -7, -5, -1, 7, 23, ?
A42
B55 ✓ Correct
C87
D95
Correct answer: (B) 55
Explanation
The next term is 55.
Differences are 2, 4, 8, 16, doubling each step.
The next difference is 16 x 2 = 32.
Add to the last term: 23 + 32 = 55.
So the term is 55.
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