Solution:
If the last two digits are 04,08,20,40,60,80 then the remaining can be filled in 8! ways.
If the last two digits are 12,16,24,28,32,36,48,52,56,64,68,72,76,84,92,96 then the remaining an be filled in 8!−7! ways.
∴ total number of ways =6.8!+16(8!−7!) =6.81+16.7!7 =6(8!)+112(7!)
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