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There are 25 red balls, 47 green balls and 3 blue balls in a basket. There is a blind man. What is the minimum number of balls that the blind man has to pick to make sure that there are at least 2 balls of different colors?
If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?
Dean Sam and Castiel are three brothers. Interestingly their current age is prime. What's more interesting that difference between their ages is also prime. How old are they?
Joe has ten coins totaling $1.19. From these coins, he cannot make exact change for a dollar, half-dollar, quarter, dime, or nickel. What are the coins?
If two is a company and three is a crowd, what are four and five?
How much dirt is in a hole 4 feet deep and 2 feet wide?
What odd number becomes even when beheaded?
In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?
Add me to myself and multiply by 4. Divide me by 8 and you will have me once more. What number am I?
There is a three digit number. The second digit is four times as big as the third digit, while the first digit is three less than the second digit. What is the number?
Mr. Smith has two children. If the older child is a boy, what are the odds that the other child is also a boy?
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