求一道数学题

zhang200824

if p, s, and t are
positive prime numbers, what is the value of p^3s^3t^3?

 

(1) p^3st=728

 

(2) t=13

A 怎么可以求出来答案啊？ 

in a certain game
played with red chips and blue chips, each red chip has a point value of X and
each blue chip has a point value of Y, where X>Y and X and Y are positive
integers. If a player has 5 red chips and 3 blue chips, what is the average
(arithmetic mean ) point value of the 8 chips that the player has?

                

(1)   The average point value of one red chip and
one blue chip is 5.

                

(2)   The average point value of the 8 chips that
the player has is an integer.

[此贴子已经被作者于2009/9/21 19:49:08编辑过]

zhang200824

Can a certain
rectangular sheet of glass be positioned on a rectangular tabletop so that it
covers the entire tabletop and its edges are parallel to the edges of the
tabletop?

 

(1)   The tabletop is 36 inches wide by 60 inches
long.

 

(2)   The area of one side of the sheet of glass
is 2400 square inches.

The operation*
represents either addition, subtraction, or multiplication of integers, what is
the value of 1*0?

        

(1)   0*2=2 

        

(2)    2*0=2

B为什么不可以啊 ？

又一道题，，， 怎么没人解答我啊。。。 

[此贴子已经被作者于2009/9/21 19:57:33编辑过]

swacka

p^3*s*t=2^3*13*7只有一种可能那 {pst}^3就出来啦

swacka

第二个我选c 好像单独AB 做不出来

swacka

第三是E吧 长宽比例不确定的话 可能性有许多

zhang200824

第二个为什么不是E啊？

8的倍数有很多。。。 啊 不是吗？

swacka

第四题 我觉得【2】是ok的呀～～～选D

swacka

因为XY的和为10 X>Y X肯定要大于5小于10

swacka

遇到像这样的一个条件是数字 一个条件是一种制约的条件要谨慎  很多DS都是这样就选C的

妙妙cathy

第二题到底选什么啊