a |
b=(2*a-1)/3 |
c=12*a+5 |
d=18*b+11 |
MOD(C6,8) |
|
2 |
1 |
29 |
29 |
5 |
|
5 |
3 |
65 |
65 |
1 |
|
8 |
5 |
101 |
101 |
5 |
|
11 |
7 |
137 |
137 |
1 |
|
14 |
9 |
173 |
173 |
5 |
|
17 |
11 |
209 |
209 |
1 |
|
20 |
13 |
245 |
245 |
5 |
|
23 |
15 |
281 |
281 |
1 |
|
26 |
17 |
317 |
317 |
5 |
|
29 |
19 |
353 |
353 |
1 |
|
32 |
21 |
389 |
389 |
5 |
|
35 |
23 |
425 |
425 |
1 |
|
38 |
25 |
461 |
461 |
5 |
|
answer should be E, coz the reminder could be either 1 or 5.
I just used EXCEL to prove my hypothsis, since I gotta the equation 2*a=3*b+1, thus each ai should be 3 greater than a (i-1). thus for each integer Ni, which equal to 12*ai+5, should be 36 greater than N(i-1). coz, 36 is not devidable by 8. the reminder could be compound.
and I used EXCEL to prove my solution. Yes, there are two probabilities.
THIS QUESTION IS SUCK
[此贴子已经被作者于2005-4-12 15:11:09编辑过] |