Sonu used the digits 9, 2 and 6 to make all possible different 3-digit numbers.

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What is the sum of the?greatest?and the?smallest?numbers formed by Sonu?

Dear Student,
Case 1: If repetition is allowed then: 
Largest number=999
Smallest number=222
Sum=999+222=1221.
Case 2: If repetition is not allowed then: 
Largest number=962
Smallest number=269
Sum=962+269=1231
Regards!
 

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