行測數(shù)字推理習(xí)題精解(3)

字號:


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    1.16,17,36,111,448,( )
    A.2472 B.2245 C.1863 D.1679
    2.15,28,54,( ),210
    A.100 B.108 C.132 D.106
    3.2/3,1/2,3/7,7/18,( )
    A.5/9 B.4/11 C.3/13 D.2/5
    4.2,3,10,15,26,( )
    A.29 B.32 C.35 D.37
    5.0,1,2,3,4,9,6,( )
    A.8 B.12 C.21 D.27
    1.分析:選B。17=16×1+1,36=17×2+2,111=36×3+3,448=111×4+4,2245=448×5+5
    2.分析:選D。第一項(xiàng)×2-2=第二項(xiàng)
    3.分析:選B。依次化為4/6,5/10,6/14,7/18,分子依次4,5,6,7等差;分母是公差為4的等差數(shù)列
    4.分析:選C。12+1=2,22-1=3,32+1=10,42-1=15,52+1=26,62-1=35
    5.分析:選D。奇數(shù)項(xiàng)0,2,4,6等差;偶數(shù)項(xiàng)1,3,9,27等比。