行测每日练习数字推理(九)
1.1,2,6,16,44,()。?
A.66 B.84 C.88 D.120?
2.0.001,0.002,0.006,0.024,()。?
A.0.045 B.0.12 C.0.038 D.0.24?
3.172,84,40,18,()。?
A.22 B.16 C.7 D.5?
【广东公务员考试网参考答案】
1.D 【解析】递推和数列的变式,即:6=(1+2)×2 ,16=(6+2)×2 ,44=(16+6)×2,推知空缺项为(44+16)×2=120,故选D项。?
2.B 【解析】做商二级等差数列。原数列的后一项除以前项一项得到一个公差为1的等差数列,即:2,3,4,故接下来一项为5,则空缺项应为0.024×5=0.12。?
3.C 【解析】做差等比数列。原数列前一项减去后一项可以得到一个公比为0.5的等比数列,即:88,44,22,故空缺项应为11-22×0.5=7。?
A.66 B.84 C.88 D.120?
2.0.001,0.002,0.006,0.024,()。?
A.0.045 B.0.12 C.0.038 D.0.24?
3.172,84,40,18,()。?
A.22 B.16 C.7 D.5?
【广东公务员考试网参考答案】
1.D 【解析】递推和数列的变式,即:6=(1+2)×2 ,16=(6+2)×2 ,44=(16+6)×2,推知空缺项为(44+16)×2=120,故选D项。?
2.B 【解析】做商二级等差数列。原数列的后一项除以前项一项得到一个公差为1的等差数列,即:2,3,4,故接下来一项为5,则空缺项应为0.024×5=0.12。?
3.C 【解析】做差等比数列。原数列前一项减去后一项可以得到一个公比为0.5的等比数列,即:88,44,22,故空缺项应为11-22×0.5=7。?
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