alleryप्रत्येक चरण में दोगुना करें और एक जोड़ें: 1, 3, 7, 15, 31। अगली संख्या कौन-सी है?
A62
B63
C61
D64
Answer & Solution
Correct answer: B. 63
प्रत्येक पद पिछले पद के दोगुने में एक जोड़कर प्राप्त होता है, इसलिए 31 × 2 + 1 = 63।
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