Find the next term in the series: 6, 13, 27, 55, 111, ?
A333
B166
C223 ✓ Correct
D222
Correct answer: (C) 223
Explanation
The next term is 223.
Each term follows previous x 2 + 1.
6 x 2 + 1 = 13, 13 x 2 + 1 = 27.
27 x 2 + 1 = 55, 55 x 2 + 1 = 111.
111 x 2 + 1 = 223.
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