提问几道GRE数学题

提问几道GRE数学题
1.若自然数n被3除余2,被4除余1,问n被12除余几?5
2.2001年的元旦是星期六,问2002年的元旦是星期几?周日 用到同余理论?
3．若自然数n是完全平方数,则根号下n也为n的一个因子,在n的所有银子中除去根号下n之外,小于根号下n的因子占一半,大于根号下n的因子也占一半.啥意思?以36为例子?
4.How
many fifths are in 280%?14 此题啥意思
5.A
clerk’s salary is 320 dollars after a 25% raise.Before the clerk’s raise,the
supervisor’s salary was 50% greater than the clerk’s salary.If the supervisor
also receives a raise in the same amount as the clerk’s raise,what is the
supervisor’s salary after the raise?448
为何“receives a raise in the same amount as the
clerk’s raise”不是指前面的25% raise?而是具体增加的数值?