Question 19

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Question 19

Post by TECHNOTHLON on Thu Jul 21, 2016 11:36 am

Question 19:
Rastapopoulos had announced that it would issue six-digit identity numbers to all his soldiers using numbers 0 through 9. If each number has to differ from every other number in at least two places. What is the highest population the island can have?
a) 99999 b) 100000 c) 999999 d) None of these

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Re: Question 19

Post by @ImAJinkya_1707 on Sat Jul 23, 2016 10:13 am

Answer is b)100000

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Re: Question 19

Post by Poirot on Sat Jul 23, 2016 9:02 pm

GR8!!!

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Re: Question 19

Post by Hello on Sun Jul 24, 2016 9:02 am

Ans is c)

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Re: Question 19

Post by OO7 on Sun Jul 24, 2016 4:55 pm

Ans is (a) 99999

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Re: Question 19

Post by All the best on Thu Jul 28, 2016 5:03 pm

Answer keys are available on Technothlon downloads page.Type your score here accordingly.

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Correction in Answer Key

Post by Participant on Wed Aug 03, 2016 8:35 pm

In the question, it is clearly stated that the identity numbers shoud be six digits long.
I feel that you have failed to consider that in your solution.

By that logic the first digit cannot be zero.
Therefore, the total number of ways should be 9x10x10x10x10 = 90000

Therefore, the answer should be d) None of these and not what is given in the answer key.

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Re: Question 19

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