Problem 1 · 2014 Math Kangaroo
Easy
Logic & Word Problems
careful-counting
The Mathematical Kangaroo takes place each year on the third Thursday of March. What is the latest possible date on which the competition could take place?
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Answer: D — 21 March
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Hint 1 of 2
The third Thursday is latest when the first Thursday falls as late in March as possible.
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Hint 2 of 2
The first Thursday is latest when March 1st is a Friday; then count two weeks forward.
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Approach: push the first Thursday as late as possible
- The third Thursday is latest when the very first Thursday of March is as late as it can be.
- If March 1st is a Friday, the first Thursday is the 7th.
- Adding two more weeks gives the third Thursday on the 7th + 14 = 21st.
- So the latest possible date is 21 March.
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