1. 6,8,14,22,36,( )
A.49 B.58 C.61 D.72
2. 3,2,10,24,68,( )
A.80 B.92 C.184 D.366
3. 3,21,126,630,2520,( )
A.2400 B.5460 C.6210 D.7560
4. 18,1/3,6,2,12,( )
A.26 B.24 C.22 D.20
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