Question 1096519
#SOLN
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...Let's crack some nuts...
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Collect data..
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Only numbers with 0, 1 and 8 do not oppose the motion.
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Process data..
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Form seven-digit numbers with 0, 1 and 8
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Millions place can take only 2 digits (1 and 8)
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Others (from hundreds of thousand down to unit) can take all 3 each.
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We have:
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[2][3][3][3][3][3][3] nos
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Give out Information..
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558 seven-digit numbers can be rotated half way but remain same.
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#CRACKED
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Your friend,
Francis.