2 இல் தொடங்கும்; மாற்று ×2+a, பிறகு ×3−b, a,b ஒவ்வொன்றும் 1–4. வேறு ஒரு சொல் தவறாக உள்ளது:2,8,19,41,121,245. அதன் மாற்று?
A6
B8
C9
D7
Answer & Solution
Correct answer: D. 7
a=3,b=2 என்பது ஒரு காலத்தைத் தவிர மற்ற அனைத்திற்கும் பொருந்தும், 2,7,19,41,121,245.
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