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Divisibility Rules

Mike McGarry
Lesson by Mike McGarry
Magoosh Expert
Summary
The content provides an in-depth exploration of divisibility rules, crucial for mastering numerical reasoning questions on the GRE exam.
  • Divisibility rules for 2 and 5 are based on the last digit of the number.
  • The rule for 4 requires examining the last two digits, while the rules for 3 and 9 involve summing all the digits of the number.
  • A number is divisible by 6 if it meets the criteria for divisibility by both 2 and 3.
  • Practical examples are provided to illustrate how each divisibility rule is applied to both simple and complex numbers.
  • Understanding these rules is essential for efficiently solving a wide range of quantitative problems on the GRE.
Chapters
00:00
Introduction to Divisibility Rules
00:42
Basic Divisibility Rules: 2 and 5
02:25
Advanced Divisibility Rules: 3, 4, and 9
06:31
The Divisibility Rule for 6