alleryஒவ்வொரு படியிலும் இரட்டிப்பாக்கி ஒன்று கூட்டப்படுகிறது: 1, 3, 7, 15, 31. அடுத்த எண் எது?
A62
B63
C61
D64
Answer & Solution
Correct answer: B. 63
ஒவ்வொரு உறுப்பும் முந்தைய உறுப்பை இரட்டிப்பாக்கி ஒன்று கூட்டுவதாகும், எனவே 31 x 2 + 1 = 63.
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