【例题】20,20,33,59,98,( )
A.150 B.152 C.154 D.156
【例题】1,4,3,1,1/5,1/36,( )
A.1/92 B.1/124 C.1/262 D.1/343
【例题】675,225,90,45,30,30,( )
A.27 B.38 C.60 D.124
【例题】34,-6,14,4,9,13/2,( )
A.33/2 B.25/3 C.27/4 D.31/4
【例题】0,7,26,63,124,( )
A.209 B.215 C.224 D.262
【答案】A。33=20+13,59=33+13×2 ,98=59+13×3 ,150=98+13×4 。
【答案】D。1^3,2^2,3^1 5^-1,6^-2,7^-3
【答案】C。675/225=3,225/90=5/2 ,90/45=2 ,45/30=3/2 ,30/30=1 ,30/()=1/2 =>()=60
【答案】D。(34+-6)/2=14 ............
【答案】B。1^3-1,2^3-1,4^3-1,5^3-1,6^3-1
未完待续……