Brain Teasers............... 10 points for the best?

Sinbad the sailor is known to have travelled around the world seven times. During which round (which time) of travel did he die of a mysterious disease?

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There are 7999 card castles made every year around the world. each castle is of 15 storeys. each card castle is made up of 1853 cards. every card is either an ace or an heart but not a diamond nor a spade. every storey of the card castle requires 100 cards which reduces by 6 for every floor made up. my question that will not be to you is not that how many cards are there in a pack but is what is the probability that u get to make sixteenth floor of the castle?

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if a train travels at 340 miles per hour and a man is travelling in the opposite direction outside the train at 10 kms per hour at what speed are the passengers travelling

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