divisibility rules
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
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