The average between a two digit number and the number
obtained by interchanging the digits is 9. What is the
difference between the two digits of the number?
(a) 8
(b) 2
(c) 5
(d) Cannot be determined
(e) None of these
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( d ) Cannot be determined
Bcoz the average of the two numbers is 9,their sum should be
18..
The sum of 2 two digit numbers cannot be 18..so,answer is
d)Cannot be determined
( d ) Cannot be determined