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  Like every poshenloh meeting I go to, there's people spamming Rat Chelay

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  This is in Module 0, Week 2 Test.

• Daily Challenge Course Discussion

  M0 Introduction M1 Algebra Basics M2 Geometry Tools M3 Combinatorics Tools M4 Algebra Tools M5 Number Theory Tools Practice Mini-Courses
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  @thoughtfulmongoose Let a=2x and b=2y, then the question is asking for the GCD of 2x and 4y. Obviously 2 is a common divisor, but we don't know if x has any more 2s in it. If x has one more factor of 2 and y has none then the greatest common divisor is 4. So the answer should be NEI(not enough info)

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  "Ask Math Anything" Chat Group Math Competition Problem Reviews 2020 AMC 8 Live Solve
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  @readingallday Absolute value is a number's distance from 0. This is why positive numbers stay positive, and negative numbers become positive in these problems, as we are just counting how many units a number is from zero. Ex: (-7 is 7 units away from 0 & 7 is also just 7 units away from 0 but in opposite directions).