GMAT数学考试中,也会考察一些逻辑类的知识点,相对来说这部分的内容难度更大,大家想要在数学考试中有更好的表现,那么对于这些内容,我们也要有充分的了解。那么具体的GMAT数学考试中常见的逻辑知识是什么呢?下面小编为大家整理了详细的内容,供大家参考!

  在数学概念中,“number”是“数量”,“proportion”是“比例”。本文的讨论范围在,“数量”与“比例”通常都表示同一个对象的参数。比如说,某大学女学生的数量和女学生占的比例。那么,在总量(分母)不变的情况下,数量(分子)增大,比例就增大;数量减少,比例就下降,此时数量和比例是成正比关系的。但是,在逻辑题中,总量是否不变,题干有时候并没有给出明确的信息。而这一点,往往就是极其容易被忽视的一点。下面用个别例子加以说明。

  OG18-P522-591.Humans get Lyme disease from infected ticks. Ticks get infected by feeding on animals with Lyme disease. But the ease with transmission from host animal to tick varies. With most species of host animal, transmission of Lyme disease to ticks is extremely rare, but white-footed mice are an exception, readily passing Lyme disease to ticks. And white-footed mouse populations greatly expand, becoming the main food source for ticks, in area where biodiversity is in decline. (本题选C项)

  The information in the passage most strongly supports which of the following?

  A. In area where many humans are infected with Lyme disease, the proportionof ticks infected with Lyme disease is especially high.

  B. Very few animals that live in areas where there are no white-footed mice are infected with Lyme disease.

  C. Humans are less at risk of contracting Lyme disease where biodiversity is high.

  D. Ticks feed on white-footed mice only when other host species are not available to them.

  E. The greater the biodiversity of an area, the more likely any given host animal in that area is to pass Lyme disease to ticks.

  人类从得病的虱子身上传染莱姆病,而得病的虱子是从得病的动物身上传染的,其中主要是得病的白脚鼠。白脚鼠的数量急剧上升,导致一些地区的生物多样性急剧下降,成为虱子的主要寄宿主。问题是:可从以上信息中总结出什么?有同学错选A项,很可能是错以为proportion高,就是数量高。感染疾病的人数多,或许可以说明得病的虱子数量多,但是虱子总量未知,不能确定比例高。

  number与proportion还经常表现为人口数量与人口架构上。同学们在做题时,需要仔细读材料读选项,碰到类似的字眼多多留意,慧眼识陷阱。

  以上就是关于“GMAT数学逻辑题的陷阱”的内容,希望通过上述内容的学习,大家能够更好的备考GMAT数学考试,希望每位考生能够有更好的发挥,夺取高分成绩。

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