alleryশুরু 2; বিকল্প ×2+a, তারপর ×3−b, a,b প্রতিটি 1–4 সহ। ঠিক অন্য একটি শব্দ ভুল:2,8,19,41,121,245। এর প্রতিস্থাপন?
A6
B8
C9
D7
Answer & Solution
Correct answer: D. 7
শুধুমাত্র a=3,b=2 একটি টার্ম ছাড়া সব ফিট করে, 2,7,19,41,121,245 দিচ্ছে।
Keep practising Arithmetic and Non-verbal Series
Browse all Arithmetic and Non-verbal Series questions for RPF Constable, or explore more General Intelligence and Reasoning topics.
Related questions
Continue the patternsContinue the patternsUse1–6 once in a row. The5 absolute neighbour differences must be1–5 once each. First=2,laTwo arithmetic progressions alternate. One adjacent pair was swapped:3,6,8,13,10,14,18,18.The row a,b,c,d,e,f uses1–6 once. c=a+b; e=b+d; f=a+d; a<b<d. Find e.Match the calculated resultLabels 7, 12, 17, ..., 82 rise by 5; one is lost, leaving sum 660. Lost label?Row sizes rise equally; row 4 has 19 and row 10 has 49. Row 15 size?