Monthly Archives: October 2021

Math Olympiad for 3rd Grade – 6

Posted on October 29, 2021 by kevin

Is the following a square number? $$1!+2!+3!+4!+5!+6!+7!$$ There are $100$ cups labeled from $1, 2, 3, … 100$. You distribute $1$ candy in the first cup, $2$ candies in the second cup, and $3$ candies in the third cup, and … Continue reading →

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Geometry Challenge – 8 ⭐

Posted on October 16, 2021 by kevin

In unit square $ABCD$, point $E$ and $F$ are located on edge $CD$, with $E$ closer to $D$ and $F$ closer to $C$. Line $BE$ and $AF$ intersect at $G$, forming two triangles: $\triangle{ABG}$ and $\triangle{EFG}$. Find the minimum value … Continue reading →

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Math Olympiad for 3rd Grade – 5

Posted on October 15, 2021 by kevin

Amy, Bob, Charlie, David and Emily took part in a math exam. Their average score was 85. After checking his answer sheet against the answer sheet, Amy found that her score was wrong and reported it to her teacher. After … Continue reading →

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Math Olympiad for 3rd Grade – 4

Posted on October 1, 2021 by kevin

Kevin was calculating the product of two numbers. One of the numbers is 78. However, instead of using 78, he was using 87 and the result was off by 45. The other number used in multiplication is __________. The sum … Continue reading →

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