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Find the next term: 5, 11, 23, 47, 95, ?

A183
B189
C190
D191
Answer & Solution
Correct answer: D. 191
1. Observe: 11 = 2*5 + 1, 23 = 2*11 + 1. 2. Continuing: 47 = 2*23 + 1, 95 = 2*47 + 1. 3. Rule: each term doubles the previous and adds 1. 4. Next = 2*95 + 1 = 191. _Source: ICAI BoS Foundation Paper 3, Ch 9 'Series', p.4_
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