MOEMS | 2022~2023 | Contest 2 | Division E | Answers & Solutions

Math Olympiad is a great way to challenge yourself in terms of thinking both critically and flexibility. This is something that you can compete in by yourself or register to be part of your school's team. In this video, Kalie will be sharing the answers and solutions to the Division E MOEMS contest questions for 2022~2023.

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2A Evaluate: 6789 - 678 + 5678 - 567 + 4567 - 456.

2B Maria is placing stakes in her garden in a straight line. The 10 stakes are equally spaced. The first and fourth stakes are 10 feet apart. How far apart, in feet, are the first and tenth stakes? [Ignore the width of the stakes.]

2C Ellie's favorite number is the least 3-digit number greater than 200 that satisfies the following conditions:
(1) it is a multiple of 6
(2) the sum of the digits is 9
What is Ellie's favorite number?

2D At the Orb Theater, there are 30 rows of seats. The first row has 20 seats, and each row behind the first has 2 seats more than the row in front of it. The last row has 78 seats. What is the total number of seats in the Orb Theater?

2E How many rectangles (including squares) are in this diagram?