Tag Archives: Puzzle

David Brode

David Brode is a financial modeler in Boulder, Colorado.  An avid puzzle solver, he found this blog while searching for puzzles online.  He was intrigued by the puzzles and was curious to see a kindred spirit in Colorado.  David called … Continue reading

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Puzzle #7: The Mysterious Islands

Many years ago, a large jetliner crashed into the ocean.  No one could ever find the plane or any of its passengers or crew.  The outside world did not know that there were many survivors.  They made their way to … Continue reading

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Puzzle #6: Treasury Debt

Last week was historic for U.S. Treasury debt.  The yield on the 10-year Treasury dipped below 1.44% to its lowest level ever, and the total debt held by the public* rose to $11,006,251,094,374.26. Some might argue that $11 trillion in public … Continue reading

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Puzzle #5 (Answer): Leaping to Conclusions

Puzzle #5: A Royal Mystery posed the following question: Gregory was born on a Monday in New York City.  His father sent out Western Union telegrams to announce the birth.  The family later moved to London.  On his seventh birthday, … Continue reading

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Puzzle #5: A Royal Mystery

Gregory was born on a Monday in New York City.  His father sent out Western Union telegrams to announce the birth.  The family later moved to London.  On his seventh birthday, which was also a Monday, the boy saw the … Continue reading

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Puzzle #4: Bond Pricing

Here’s another puzzle I’ve used to teach bond math. It’s not hard, but it requires some understanding of bond concepts that I will explain as we go (I beg the patience of bond mavens). Suppose you are the financial advisor … Continue reading

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Puzzle #3: A Better Answer

Puzzle #3 asked for the weighted average life (“WAL”) of the principal payments for a 30-year mortgage that is cut short by a balloon payment at 15 years. The following information was provided: $100,000 Principal; 5% Interest Rate; $536.82 Level … Continue reading

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