No student devices needed. Know more
10 questions
Double 20
60
54
44
40
Halve 54
26
27
28
29
Double 39
81
80
78
79
Halve 98
50
49
51
52
Double 50
400
100
200
300
Halve 44
25
24
23
22
Halve 74
37
38
39
40
Double 18
37
36
38
39
Halve 92
49
48
46
47
Double 34
68
69
70
71
Explore all questions with a free account