2016-04-16 10:41:17拜足
數字 撲朔迷您 60
√ (a+b-c-d) = √(a-b) + √(c-d)
solution
a :1000
b: 100
c:10
d:1
√ (1000+100-10-1) =√ (1089) = 33 = √ (1000-100) + √ (10-1)
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√(001) + √(004) + √(900) =
√(009) + √(400) + √(100) = 33
√(001) + √(144) + √(961) =
√(169) + √(441) + √(100) = 34
just for fun.
Interesting Multiplication,
63 x 84 = 48 x 36,
this one is easy.
and this one is incredible!
203313 × 657624 = 426756 × 313302
if you rule out some trivial & easy solutions like
123456 x 654321
= 123456 x 654321 I don't know if there were another answers besides 203313 × 657624 = 426756 × 313302 the chance for 6 digits x 6 digits is about a little bit higher than 1 over a trillion.