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精选知识

当用东部时间的纽约在中午十二点的时候,用太平洋时间的旧金山时间为早上九点.一架飞机从纽约起飞,起飞时间是东部时间中午十二点,到达旧金山的时间是太平洋时间下午四点.立马折回去,飞行时间一样,请问什么时候到达纽约（东部标准时间）?

东部时间十二点起飞,太平洋时间四点到,实际用时七个小时,在折回去又要花七个小时,所这一来一回花了14个小时.从第一次起飞（纽约时间）算起,共花费14小时,所以飞回去的时间点是12（noon）+14h=26h,也就是第二天的2:00A.M.

其他类似问题

问题1：sat数学题The sum of four consecutive odd integers w,x,y,and z is 24.What is the median of the set{ w,x,y,z,24}?[数学科目]

题目是在问：4个连续奇数w,x,y,z的和是24 ,这一组数{ w,x,y,z,24}的中位数是多少?

median是中位数的意思 当然 y就是这组数中的中位数啦

4个奇数很好求 w+(w+2)+(w+4)+(w+6)=24 得w=3 y=w+4=7

所以 答案是7

问题2：.SAT的数学题In the 30-day month of April,for every three days it rained ,there were two days it did not rain.The number if days in April on which ie rained was how much great than the number of days on which it did not rain?[英语科目]

1楼读错了.

说四月30天.每下三天雨,就有2天没下雨（也就是说下雨天：不下雨天的比例是3:2）,问下雨的天天数比不下雨的天天数多多少.

所以,30/(3+2) = 6

3*6 = 18天下雨

2*6 = 12天没下雨

18-12=6天

问题3：if 3 more than x is 2 less than 9 ,what is the value of x if 4 bags of flour with an average (arithmetic mean)weight of 15pounds are put onto a shelf with 45-pound bags of flour ,what is the average weight ,in pounds of all 8 bags on the shelf a cert[英语科目]

1.x+3 = 9-2,x=4

2.（4×15+45）/8= 13.125 pounds

3.组合,C(6,2)=15

4.40的正因子有：1,2,4,5,8,10,20,40

因此,取到10的倍数的概率为3/8

5.9倍,问的是等边三角形边长*3,则面积是原来的多少倍

6.x/5=y+3,

so,x=5y+15

x+19=5y+34=5*(y+6)+4,so the remainder is 4

问题4：90n+23p=4523.If n and p are positive integers in the equation above,what is one possible value of n+p?怎么算?是51，118和185[数学科目]

n、p 均为正整数

90n+23p=4523

n=4523/90 - 23/90 p

n+p=4523/90 - 23/90 p +p=(4523+67p)/90 属于正整数

所以4523+67p)是90的倍数

所以当p=1时就符合

n+p=（4523+67)/90=51

由于电脑上不便于操作没有用数学符号,你自己写答案的时候一定要记得用数学符号哟!

问题5：sat 题目不难吧就是没怎么看透题干On a square gameboard this is divided into n rows of n squares each,k of these squares lie along the boundary of the gameboard.Which of the following is a possible value of A.10 B.25 C.34 D.42 E.52[英语科目]

这题我做过

题目翻译：在一个nXn的正方形棋盘上,棋盘最外围一圈有K个方块,k可能的数值是几?

答案是E

可以轻易得出k=4n-4

所以k一定要能被4整除

只有52能.

还有问题追问哦亲~