Pick a number between 1 and 30 and then select all the cards that contain this number. And then let Mathy read your mind and show you the number you have chosen.
Let the math happen!
01
03
05
07
09
11
13
15
17
19
21
23
25
27
29
02
03
06
07
10
11
14
15
18
19
22
23
26
27
30
04
05
06
07
12
13
14
15
20
21
22
23
28
29
30
08
09
10
11
12
13
14
15
24
25
26
27
28
29
30
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Find