allery2, ?, 12, 20, 30 என்பதில் ஒரு மதிப்பு மறைக்கப்பட்டுள்ளது. அந்த மறைக்கப்பட்ட எண் என்ன?
A6
B8
C4
D10
Answer & Solution
Correct answer: A. 6
உறுப்புகள் n x (n + 1) முறையைப் பின்பற்றுகின்றன: 1x2, 2x3, 3x4, 4x5, 5x6, எனவே இரண்டாவது உறுப்பு 6 ஆகும்.
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?