Q: 136 (IAS/2004)

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How many three-digit even numbers are there such that 9 comes as a succeeding digit in any number only when 7 is the preceding digit and 7 is the preceding digit only when 9 is the succeeding digit?
question_subject: 
Maths
question_year: 
2004
question_exam: 
IAS
question_sub_subject: 
Mathematics
question_topic: 
Mathematics
stats: 
0,72,160,48,64,48,72