A bag contains one red ball & nine black balls. Ten people draw one ball at a time, and the one who pulls the red ball gets $1 million. Where are you best off going? (Once removed, balls are not replaced.)
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There is a house where people use the toilet 4 times daily, three times for number ones, and once for number twos. The house rule is you’re meant to leave the toilet seat in the state the next user is most likely to want it. There are five men & two women in the house. Mathematically speaking, should the seat be left up or down?
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What is an anagram of twelve plus one & is mathematically the same as twelve plus one?
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If you flip two coins, what is the chance of getting two heads?
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In 1986 a group of 4,000 physicists met stayed at the MGM Grand in Las Vegas for a conference. The hotel asked them not to come back. Why?
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Peter the Piemaker is having people over and knows there will either be 7 or 8 people in attendance.
What is the fewest number of slices he needs to make sure everyone gets an equal amount of pie, regardless of whether there is 7 or 8 people there?
(The slices DON’T need to be the same size, as long as everyone gets the same amount of pie.)
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A newspaper is printed on several sheets of paper and then folded down the middle. Each sheet of paper therefore contains four pages.
Your newspaper has 28 as the back page, but you notice that a sheet is missing. One of the missing pages is 8. What are the other three missing pages?
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Imagine three sealed envelopes.
One contains a cheque for $10, one contains a cheque for $100, and one contains a cheque for $1,000.
Envelope A says: A has more money than B. Envelope B says: B does not contain $10. Envelope C says: C has less money than B. The message on exactly one of the envelopes is a lie.
Where is the $1,000?
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You have 25 horses and you need to find the fastest three.
They always run at the same pace, you don’t have a stopwatch, and you can race up to five horses at a time.
What is the least number of races you need to run to find the three fastest.
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On Monday we asked about a survey determining people’s favourite numbers.
What was the LEAST favourite number. Specifically, what was the lowest number that none of the 30,000 people surveyed chose?
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