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Base Eight Numbering
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?
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Find the Poisoned Can
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?
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Aptitude IT Giant Programming
The IT giant Tirnop has recently crossed a head count of 150000 and earnings of $7 billion. As one of the forerunners in the technologyfront, Tirnop continues to lead the way in products and services in India. At Tirnop, all programmers are equal in every respect. Theyreceive identical salaries ans also write code at the same rate.Suppose 12 such programmers take 12 minutes to write 12 lines of code...
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9 Digit Numbers
How many 9 digit numbers are possible by using the digits 1,2,3,4,5 which are divisible by 4 if the repetition is allowed?
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Probability
4) There are 5 distinct pairs of white socks and 5 pairs of black socks in a cupboard. In the dark, how many socks do I have to pull out to ensure that I have at least 1 correct pair of white socks? a) 3 b) 11 c) 12 d) 16
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