https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:prime-time/x04ca845a9a148c80:common-multiples-and-common-factors/v/common-factors-and-common-multiples 2024-05-29T07:44:09.146521489Z Common factors and common multiples Description In this video we discuss the concept of common factors and then common multiples and also the foundation that builds HCF and LCM Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Common factors and common multiples Description In this video we discuss the concept of common factors and then common multiples and also the foundation that builds HCF and LCM https://cdn.kastatic.org/ka-youtube-converted/eTvTj1j2cSI.mp4/eTvTj1j2cSI.mp4 416 Prime Time https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:prime-time/x04ca845a9a148c80:common-multiples-and-common-factors/v/finding-factors-and-multiples-indian-accent 2025-06-05T06:01:43.515132284Z Finding factors and multiples Sal uses divisibility rules to determine if numbers are factors of 154 and then finds multiples of 14. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw 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/-R8VD80xia8.mp4/-R8VD80xia8.mp4 246 Prime Time https://www.khanacademy.org/math/od-math-class-6-revision-term-1-2026/xa6ce040ffac41d24:week-3/xa6ce040ffac41d24:prime-time/e/prime-time-revision-exercise-1 2026-08-03T05:50:35.878067118Z Prime Time - Revision Exercise 1 Prime Time - Revision Exercise 1 Khan Academy exercise https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:prime-time/x04ca845a9a148c80:prime-numbers/v/recognizing-prime-and-composite-numbers-indian-accent 2025-05-30T05:30:36.604331212Z Recognizing prime and composite numbers Can you recognize the prime numbers in this group of numbers? Which are prime, composite, or neither? Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Recognizing prime and composite numbers Can you recognize the prime numbers in this group of numbers? Which are prime, composite, or neither? https://cdn.kastatic.org/ka-youtube-converted/e7A9RLC_rS4.mp4/e7A9RLC_rS4.mp4 275 Prime Time https://www.khanacademy.org/math/od-math-class-6-revision-term-1-2026/xa6ce040ffac41d24:week-3/xa6ce040ffac41d24:prime-time/e/prime-time-revision-exercise-2 2026-08-03T05:50:35.878067118Z Prime Time - Revision Exercise 2 Prime Time - Revision Exercise 2 Khan Academy exercise https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:prime-time/x04ca845a9a148c80:co-prime-numbers/v/co-prime-and-twin-prime-numbers 2026-01-16T09:40:42.440263577Z Co-Prime and Twin prime Numbers In this video, we explore two important concepts in number theory: co-prime numbers and twin primes. Co-prime numbers are pairs of integers that share no common factor other than 1, and we also discuss their special divisibility property—if two co-primes both divide a number, then their product also divides that number. Alongside this, we introduce twin primes, which are pairs of prime numbers differing by exactly 2, such as (11, 13) or (17, 19). With clear explanations and examples, this video makes these ideas simple to understand and shows how they reveal unique relationships between numbers. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Co-Prime and Twin prime Numbers In this video, we explore two important concepts in number theory: co-prime numbers and twin primes. Co-prime numbers are pairs of integers that share no common factor other than 1, and we also discuss their special divisibility property—if two co-primes both divide a number, then their product also divides that number. Alongside this, we introduce twin primes, which are pairs of prime numbers differing by exactly 2, such as (11, 13) or (17, 19). With clear explanations and examples, this video makes these ideas simple to understand and shows how they reveal unique relationships between numbers. https://cdn.kastatic.org/ka-youtube-converted/JTqQtJYIG04.mp4/JTqQtJYIG04.mp4 269 Prime Time https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:prime-time/x04ca845a9a148c80:prime-factorization/v/prime-factorization-exercise-india 2025-03-28T07:16:04.402919306Z Prime factorization exercise Prime factorization exercise (Indian Accent) Aakash Bagga video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Prime factorization exercise Prime factorization exercise (Indian Accent) https://cdn.kastatic.org/ka-youtube-converted/aqO-WK1SkSc.mp4/aqO-WK1SkSc.mp4 229 Prime Time https://www.khanacademy.org/math/revision-mh-math-class-6/x01cb2212e31ce997:decimal-fractions/x01cb2212e31ce997:divisibility-hcf-lcm/v/divisibility-tests-for-2-3-4-5-6-9-10-indian-accent 2025-05-30T05:30:36.604331212Z Divisibility tests for 2, 3, 4, 5, 6, 9, 10 Worked example of basic divisibility tests. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Divisibility tests for 2, 3, 4, 5, 6, 9, 10 Worked example of basic divisibility tests. https://cdn.kastatic.org/ka-youtube-converted/gIn4jV5r92w.mp4/gIn4jV5r92w.mp4 407 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/od-math-class-6-revision-term-1-2026/xa6ce040ffac41d24:week-3/xa6ce040ffac41d24:prime-time/e/prime-time-revision-exercise-3 2026-08-03T05:50:35.878067118Z Prime Time - Revision Exercise 3 Prime Time - Revision Exercise 3 Khan Academy exercise