alleryপ্রতিটি ধাপে দ্বিগুণ করুন এবং 1 যোগ করুন: 1, 3, 7, 15, 31। পরবর্তী সংখ্যাটি কোনটি?
A62
B63
C61
D64
Answer & Solution
Correct answer: B. 63
প্রতিটি পদ পূর্ববর্তী পদের দ্বিগুণের সাথে 1 যোগ করে পাওয়া যায়, সুতরাং 31 x 2 + 1 = 63।
Keep practising Number Series
Browse all Number Series questions for RRB NTPC, or explore more Reasoning topics.
Related questions
Squares of 3, 4, 5, 6 are 9, 16, 25, 36. What number is next?Odd gaps 3, 5, 7, 9 link 4, 7, 12, 19, 28. Which number comes next?Subtracting 1, 2, 3, 4 in turn from 20 gives 20, 19, 17, 14, 10. Next?Triangle dots run 1, 3, 6, 10, 15, 21, 28. How many are in the next?Spot the intruder among the numbers 1, 4, 9, 16, 20, 25.A prime is missing in the list 2, 3, 5, ?, 11, 13. Which one?What does the Fibonacci pattern give after the pair 8 and 13?Which square number is the sum of triangular numbers 6 and 10?