求詳解 ，內有三題

p7869

## 作答選項說明##
A. statement (1) alone is sufficient, but statement (2) alone is not sufficient
B. statement (2) alone is sufficient, but statement (1) alone is not sufficient
C. Both statements together are sufficient, but neither statement alone is sufficient
D Each statement alone is sufficient
E Statement (1) and (2) together are not sufficient
####


1.
Is S is the infinite sequence
S1=9 , S2=99 , S3=999....Sk=10的k次方 -1
Is every item in S divisible by the prime number P?
(1) P is grater than 2
(2)At least one term in sequence S is divisible by P
答案：E

2.
Terry and Pat collected cans for recycling. What was the ratio of the number of cans Terry collected to the number of cans Pat collected
(1) Pat collected 50 percent of the cans that they collected
(2) Terry collected 140 cans
答案：A

3.
If the length of each side of rectangle R is squared, what is the sum of the four squared length?
(1) The diagonal of rectangle R has length 15
(2) The product of the length of two adjacent sides of rectangle R is 108
答案：A


不知是解答錯誤還是我根本算錯，
請高手幫忙解答，
可以的話詳細一點^^ 謝謝