https://www.khanacademy.org/math/cc-fourth-grade-math/imp-factors-multiples-and-patterns/imp-factors-and-multiples/v/finding-factors-and-multiples 2021-06-21T15:29:05Z Finding factors and multiples Sal uses divisibility rules to determine if numbers are factors of 154 and then finds multiples of 14. Sal Khan video https://cdn.kastatic.org/googleusercontent/jNxayzR0Zz0f-pbmaFONjMCJ5Bodc5QpIuPX1hhmWzk4BSXDSDMZkzXBB5xwAMxyAcnIOwOWDBiyJ85dlRuIWyvD Finding factors and multiples Sal uses divisibility rules to determine if numbers are factors of 154 and then finds multiples of 14. https://cdn.kastatic.org/ka-youtube-converted/5xe-6GPR_qQ.mp4/5xe-6GPR_qQ.mp4 240 Prime time https://www.khanacademy.org/math/cc-fourth-grade-math/imp-factors-multiples-and-patterns/imp-prime-and-composite-numbers/v/prime-numbers 2021-06-21T15:29:12Z Prime numbers Prime numbers are numbers that have only 2 factors: 1 and themselves. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. By contrast, numbers with more than 2 factors are call composite numbers. Sal Khan video https://cdn.kastatic.org/googleusercontent/sybkK0hAAkEE-Ubw97XuaaOw80eEcS9b8X9i8GmF5nQcz2rGJcxEJvcACkMi6bzEiYhJbkaaklYEhPaKU79McX-3 Prime numbers Prime numbers are numbers that have only 2 factors: 1 and themselves. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. By contrast, numbers with more than 2 factors are call composite numbers. https://cdn.kastatic.org/ka-youtube-converted/mIStB5X4U8M.mp4/mIStB5X4U8M.mp4 493 Prime time https://www.khanacademy.org/math/pre-algebra/pre-algebra-factors-multiples/pre-algebra-prime-factorization-prealg/v/prime-factorization-exercise 2023-04-15T06:13:13.904395317Z Prime factorization exercise Learn to find the prime factorization of any number by breaking it down into its prime factors. Understand the difference between prime and composite numbers. Learn from guided examples of finding the prime factorization of 36, 30, and 73. Sal Khan video https://cdn.kastatic.org/googleusercontent/npQ9IhM6nfJTsvrfSFyFDAh05y0B5oZRomUSooEWkLoSBu5y-HaanKRLAVrB1LY-RpYZDz8qCfbA5NidWLuWhvpjdw Prime factorization exercise Learn to find the prime factorization of any number by breaking it down into its prime factors. Understand the difference between prime and composite numbers. Learn from guided examples of finding the prime factorization of 36, 30, and 73. https://cdn.kastatic.org/ka-youtube-converted/XWq8bplP-_E.mp4/XWq8bplP-_E.mp4 229 Prime time https://www.khanacademy.org/math/6th-engage-ny/engage-6th-module-2/6th-module-2-topic-d/v/divisibility-tests-for-2-3-4-5-6-9-10 2020-12-29T16:19:55Z Divisibility tests for 2, 3, 4, 5, 6, 9, 10 Worked example of basic divisibility tests. Sal Khan video https://cdn.kastatic.org/googleusercontent/5cSLL1AxvANtGA9oFHlOFtHk-RRoQoO-YNAKhgx-Gqd-VS-20j9paPrqykvg_4OZYwm6_3t7npfvrO0TX9oUIbo Divisibility tests for 2, 3, 4, 5, 6, 9, 10 Worked example of basic divisibility tests. https://cdn.kastatic.org/ka-youtube-converted/Df9h5t64NlQ.mp4/Df9h5t64NlQ.mp4 393 Prime time https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:prime-time/x04ca845a9a148c80:divisibility-tests/v/divisibility-tests-of-8-11-and-12 2024-05-29T07:44:09.146521489Z Divisibility tests of 8, 11 and 12 Description In this video we discuss the divisibility tests of 8 ,11 and 12 Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Divisibility tests of 8, 11 and 12 Description In this video we discuss the divisibility tests of 8 ,11 and 12 https://cdn.kastatic.org/ka-youtube-converted/I2r4zXvXan8.mp4/I2r4zXvXan8.mp4 264 Prime time https://www.khanacademy.org/math/kn-revision-class-6-math/x054680bf0d7836c8:week-2/x054680bf0d7836c8:prime-time/e/prime-numbers-revision 2026-01-23T09:20:53.984879709Z Prime numbers revision . Devashish Phadnis exercise