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Difficulty: Medium4 Star RatingPuzzle 1486

At a movie theatre, the manager announces that they will give a free ticket to the first person in line whose birthday is the same as someone who has already bought a ticket. You have the option of getting in line at any time. Assuming that you don't know anyone else's birthday and that birthdays are distributed randomly throughout the year, what position in line gives you the greatest chance of being the first duplicate birthday?

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[Ref: ZBMH]  



Difficulty: Medium4 Star RatingPuzzle 1487

What is the test to see if a number is divisible by nine?

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[Ref: ZFJD]  



Difficulty: Easy4 Star RatingPuzzle 1488

Kevin is 5 years old, James is also 5 and Rebecca is 7. How old is Jacqueline?

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[Ref: ZNZE] © Kevin Stone 



Difficulty: Medium4 Star RatingPuzzle 1489

Do the 3 hands on a clock ever divide the face of the clock into 3 equal segments, i.e. 120 degrees between each hand?

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[Ref: ZJGA]  



Difficulty: Medium4 Star RatingPuzzle 1490

How many times per day do the hour and minute hands of a clock form a right angle?

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[Ref: ZRCV]  


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