The citizens of planet X are 8 fingered and have thus developed their decimal system in base 8. A certain street on planet X contains 1000 buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?

Chockalingamkr

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• Jan 25th, 2011

64(1's place)+64(10's place)+64(100's place)=192

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If there are 30 cans out of them one is poisoned if a man tastes very little he will die within 14 hours. Now mice are used to test in 24 hours, how many mices are required to find the poisoned can?

Chockalingamkr

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• Jan 25th, 2011

5 mices .... 2^5 is 32..using combination

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