想要迅速提高GMAT数学的考试成绩,考生需要在熟练掌握GMAT数学备考要点的基础上,掌握一些实用的解题技巧,以提高GMAT数学的备考效率。下面就来为大家简单介绍一下GMAT数学考试中的常见考点及解题技巧,希望能够为考生备考GMAT数学带来帮助。
整除和余数的一些概念
被2,4,8整除的特点:
譬如说一个数3472,要知道被2整除余几,就看最后一位2除以2,余几原数3472被2除就余几,能整除则原数也能整除;被4除时,要看后两位72被4除余几,原数被4除就余几,能整除则原数也能整除;被8除时,要看最后3位472被8除余几,原数被8除就余几,能整除则原数也能被8整除
被3,9整除的特点:
还是举一个例子,3472,把这个数每一位都加起来:3+4+7+2=16,1+6=7,加完以后得的数除以3余几,原数除以3就余几,如果能整除则原数也能被3整除;加完后的数被9除余几,原数被9除就余几。
被6除时:
分别考虑被2,和被3除时的情况
被5除时:
一个数最后一位除以5余几,原数被5除就余几
被11除时:
错位相加再相减。譬如说3472错位相加再相减的过程就是-=5
最后一位数5去除以11,能整除则原数3472就可以被整除,如果不能整除则原数不能被11整除。
如何凑数?
例子:一个数n被3除余1,被4除余2,被5除余1,问被60除余几?
凑数的原则:从最小数开始;凑后边时要保证前面已经满足的不变化。
从3开始,最小为1:1
保证它的情况下凑被4除余2:当然每次就要加3,加3这么加上去得1+3+3+3=10,10被4除余2
在保证前面的情况下凑被5除余1:在10的基础上每次加上3和4的最小公倍数12,得+12+12+12=46,此时46被5除余1
检查一下,46能被3除余1,被4除余2,被5除余1。用46除以60就得到余数
以上对GMAT数学考试中的常见考点及解题技巧进行了简单的阐述,考生可以适当借鉴,并结合以上内容不断归纳和总结GMAT数学的备考方法,从而迅速提升GMAT数学考试成绩。
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