True: 12-6=6, 18-5=13, 21-7=14, 30-10=20, 11-6=5, 16-8=8, 19-12=7, 22-6=16, 18-5=13, 17-9=8, 15-12=3, 25-6=19, 27-9=18, 30-13=17, 29-6=23, False: 6-5=2, 7-3=5, 11-6=6, 13-5=7, 18-11=9, 22-8=15, 23-7=12, 30-4=22, 21-8=14, 15-9=5, 17-3=13, 11-6=4, 12-7=6, 18-9=8, 25-6=20,

Maths subtraction

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