Talk:Mackerel/@comment-25096087-20151013073502

30 Mackerel -

7*4 [28] = 2 

7*3 [21] = 9 - 5+3 = 1

7*2 [14] - 5+3(8*2) = 16 = 0

7 [23] - 5*4 = 20 - 3 = 0

.....

How you guys prepare them?