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Maths Puzzle
How many subsets of {1, 2, 3, ... , 11} contains at least one even integer?
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self Other Question
Three persons Suresh, Devesh and Prashant were born on different days in the same year. If the date and month of birth of Suresh, Devesh and Prashant are numerically equal, then what could be the minimum difference in the ages of youngest and oldest in days?
A saint has a magic pot. He puts one gold ball of radius 1mm daily inside it for 10 days. If the weight of the first ball is 1 g and if the radius of a ball inside the pot doubles every day, how much gold has the saint made due to his magic pot?