Xavier Aptitude Test 2011 Paper

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Question : 34 of 101

Marks: +1, -0

In a bank the account numbers are all 8 digit numbers and they all start with the digit

2

. So, an account number can be represented as

2x_1 x_2 x_3 x_4 x_5 x_6 x_7

. An account number is considered to be a ‘magic’ number if

x_1 x_2 x_3

is exactly the same as

x_4 x_5 x_6

x_5 x_6 x_7

x_1

can take values from 0 to

9

2

followed by seven 0s is not a valid account number. What is the maximum possible number of customers having a ‘magic’ account number?

9989
19980
1989
19999
19990

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