3 by 3 puzzle:clock ( a )
guitar ( b )
box/present ( c )
a+b+b=39
c+c+a=57
a+a+a=51
a+c+a=54
b+c+a=48
b+a+a=45
51÷3=17 ( a )
54-17-17=20 ( c )
(39-17)÷2= 11 ( b )
clock=17 guitar=11 present/box= 20
4 by 4 puzzle:
ladybug=a
apple=b
gear=c
b+a+a+b=96
a+c+a+c=84
a+b+a+c=90
a+a+b=67
a+c+b=71
a+a+a=57
b+c+c=75
57÷3=19 (a)
67-19-19=29 (b)
(75-29)÷2=23 (c)
ladybug=19 apple=29 gear=23
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