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Jing Chang
Jing Chang
February 23, 2013
24
perplexity
10+
participation
Math Stories
Bookmarks
#
Title
Date
Questions
Skips
Total
Score
1
+
stacking
10/21/2017
18
39
57
32
2
+
Padlocks
10/19/2017
15
45
60
25
3
+
Running track
02/15/2016
17
76
93
18