| 02 Oct 2009 |
$9.05
(-$1.46)
|
$6.93
(+$6.93)
|
Challenging mathematical problems with elementary solutions |
| 21 Aug 2009 |
$10.51
(+$1.72)
|
$0.00
(-$7.00)
|
Challenging mathematical problems with elementary solutions |
| 20 Aug 2009 |
$8.79
|
$7.00
|
Challenging mathematical problems with elementary solutions |
| 06 Aug 2009 |
$8.79
(+$0.11)
|
$7.00
(+$0.60)
|
Challenging mathematical problems with elementary solutions |
| 26 Jul 2009 |
$8.68
|
$6.40
(+$0.02)
|
Challenging mathematical problems with elementary solutions |
| 21 Jul 2009 |
$8.68
(+$0.62)
|
$6.38
(+$6.38)
|
Challenging mathematical problems with elementary solutions |
| 30 Jun 2009 |
$8.06
(-$1.08)
|
$0.00
(-$8.75)
|
Challenging mathematical problems with elementary solutions |
| 29 Jun 2009 |
$9.14
|
$8.75
|
Challenging mathematical problems with elementary solutions |
| 15 Jun 2009 |
$9.14
(-$0.00)
|
$8.75
(+$0.06)
|
Challenging mathematical problems with elementary solutions |
| 10 Jun 2009 |
$9.14
(+$0.68)
|
$8.69
(-$0.19)
|
Challenging mathematical problems with elementary solutions |
| 09 Jun 2009 |
$8.45
(+$0.39)
|
$8.89
(+$8.89)
|
Challenging mathematical problems with elementary solutions |