求助,PREP

miafy

11.
                        959-!-item-!-187;#058&000583

If p is a positive odd integer, what is the remainder when p is divided by 4 ?

 

(1) When p is divided by 8, the remainder is 5.

 

(2) p is the sum of the squares of two positive integers.

答案是Ｄ啊，为什么（２）可以啊

16.
                        1275-!-item-!-187;#058&000656

Lines n and p lie in the xy-plane.  Is the slope of line n less than the slope of line p ?

 

(1)  Lines n and p intersect at the point (5,1).

 

(2)  The y-intercept of line n is greater than the y-intercept of line p.

答案是Ｃ

9.   617-!-item-!-187;#058&000483

If x is a positive integer, is x < 16 ?

 

(1) x is less than the average (arithmetic mean) of the first ten positive integers.

 

(2) x is the square of an intege

答案是Ａ

mymengming

求助,PREP
    

11.
                        959-!-item-!-187;#058&000583

If p is a positive odd integer, what is the remainder when p is divided by 4 ?

(1) When p is divided by 8, the remainder is 5.

(2) p is the sum of the squares of two positive integers.

    

答案是Ｄ啊，为什么（２）可以啊

    

p is the sum
of the squares of two positive integers 奇数的平方divide
by 4, the remainder is 1，
            偶数的平房divide
by 4, the remainder is 0

    

加上题干的条件odd
integer，我们可以得到是一个奇数的平房和一个偶数的平方的和，除以4，余1

    

遇到莫名其妙的选项的时候一定要小心，且还有个技巧，就是DS题目的两个条件得出的答案一般是一样的，不会出现矛盾的情况，所以如果一个能得出明确答案，另一个就要加倍注意

    

16.
                        1275-!-item-!-187;#058&000656

Lines n and p lie in the xy-plane.  Is the slope of line n less than the slope of line p ?

(1)  Lines n and p intersect at the point (5,1).

(2)  The y-intercept of line n is greater than the y-intercept of line p.

答案是Ｃ

截距是有正负号的，把图形画出来就知道了，或者直接算，（5，1）是一个点，另一个点是（0，n）和（0，p）

9.   617-!-item-!-187;#058&000483

If x is a positive integer, is x < 16 ?

(1) x is less than the average (arithmetic mean) of the first ten positive integers.

(2) x is the square of an intege

答案是Ａ

答案是A啊，没问题

first ten positive integers.是1-10，比这个小肯定比16小