Question

12.10.2.2怎样算24点

Answer 1

单纯的12,10,2,2加减乘除无法得出,允许使用对数的情况下可以lg10=1
那么变成12 1 2 2
((12-1)*2)+2
((12+1)*2)-2
12*(1+(2/2))
((12-1)*2)+2
((12+1)*2)-2
12*(1+(2/2))
12/((2-1)/2)
(12/(2-1))*2
12*((2-1)*2)
(12*(2-1))*2
12*(2/(2-1))
(12*2)/(2-1)
12*((2/2)+1)
12*(2*(2-1))
(12*2)*(2-1)
12/((2-1)/2)
(12/(2-1))*2
12*((2-1)*2)
(12*(2-1))*2
12*(2/(2-1))
(12*2)/(2-1)
12*((2/2)+1)
12*(2*(2-1))
(12*2)*(2-1)
((1+12)*2)-2
((1+12)*2)-2
(1+(2/2))*12
(1+(2/2))*12
2+((12-1)*2)
(2*(12-1))+2
(2*(12+1))-2
2*(12/(2-1))
(2*12)/(2-1)
2*(12*(2-1))
(2*12)*(2-1)
2-((1-12)*2)
((2-1)*12)*2
(2-1)*(12*2)
(2*(1+12))-2
((2-1)*2)*12
(2-1)*(2*12)
2+(2*(12-1))
2-(2*(1-12))
2/((2-1)/12)
(2/(2-1))*12
((2/2)+1)*12
2*((2-1)*12)
(2*(2-1))*12
2+((12-1)*2)
(2*(12-1))+2
(2*(12+1))-2
2*(12/(2-1))
(2*12)/(2-1)
2*(12*(2-1))
(2*12)*(2-1)
2-((1-12)*2)
((2-1)*12)*2
(2-1)*(12*2)
(2*(1+12))-2
((2-1)*2)*12
(2-1)*(2*12)
2+(2*(12-1))
2-(2*(1-12))
2/((2-1)/12)
(2/(2-1))*12
((2/2)+1)*12
2*((2-1)*12)
(2*(2-1))*12
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