Question
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2.
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4.
Answer (Detailed Solution Below)
Option 2 : 255
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Detailed Solution
सही उत्तर 255 है।
Key Points
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prepsnap.in • Part -AQuestion:
Find the missing number in the series: 7, 15, 31, 63, 127, ? / श्रृंखला में लुप्त संख्या ज्ञात कीजिए: 7, 15, 31, 63, 127, ?
1.
253
2.
255
3.
257
4.
259
Correct Answer: 255
Each term is obtained by doubling the previous term and adding 1: 7 × 2 + 1 = 15, 15 × 2 + 1 = 31, and so on. Hence the next term is 127 × 2 + 1 = 255. / प्रत्येक पद पिछले पद को दोगुना करके 1 जोड़ने से प्राप्त होता है: 7 × 2 + 1 = 15, 15 × 2 + 1 = 31, इत्यादि। अतः अगला पद 127 × 2 + 1 = 255 होगा।
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