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 Playing with numbers 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 Playing with numbers https://www.khanacademy.org/math/uk-math-class-6/x2779fb3c4322516d:playing-with-numbers-ncert-new/x2779fb3c4322516d:factors-and-multiples/v/finding-factors-of-a-number-indian-accent 2025-06-05T07:09:47.125536708Z Finding factors of a number Find the factors of 120. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Finding factors of a number Find the factors of 120. https://cdn.kastatic.org/ka-youtube-converted/ggRlqda6qn8.mp4/ggRlqda6qn8.mp4 596 Playing with numbers 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 Playing with numbers https://www.khanacademy.org/math/class-6-ncf/x04ca845a9a148c80:prime-time/x04ca845a9a148c80:prime-numbers/v/prime-numbers-indian-accent 2025-06-05T07:09:47.125536708Z Prime numbers Courses on Khan Academy are always 100% free. Start practising—and saving your progress—now! (add course link here) Timestamps: Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Prime numbers Courses on Khan Academy are always 100% free. Start practising—and saving your progress—now! (add course link here) Timestamps: Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by https://cdn.kastatic.org/ka-youtube-converted/9AiPnas-us0.mp4/9AiPnas-us0.mp4 502 Playing with numbers 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 Playing with numbers 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 Playing with numbers 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 Playing with numbers 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 Playing with numbers https://www.khanacademy.org/math/revision-mh-math-class-6/x01cb2212e31ce997:decimal-fractions/x01cb2212e31ce997:divisibility-hcf-lcm/v/greatest-common-factor-examples-indian-accent 2025-06-05T06:01:43.515132284Z Greatest common factor examples The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share. For example, 12, 20, and 24 have two common factors: 2 and 4. The largest is 4, so we say that the GCF of 12, 20, and 24 is 4. GCF is often used to find common denominators. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Greatest common factor examples The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share. For example, 12, 20, and 24 have two common factors: 2 and 4. The largest is 4, so we say that the GCF of 12, 20, and 24 is 4. GCF is often used to find common denominators. https://cdn.kastatic.org/ka-youtube-converted/eLH4r7-CpII.mp4/eLH4r7-CpII.mp4 414 Playing with numbers https://www.khanacademy.org/math/class-6-tg/x47164056520f4c0a:playing-with-numbers/x47164056520f4c0a:lowest-common-multiple/v/lcm-by-division-method 2026-01-16T09:40:42.440263577Z LCM by Division Method In this video, we explain how to find the LCM (Least Common Multiple) of two or more numbers using the division method. Step by step, you’ll see how we divide the given numbers simultaneously by prime numbers, continuing the process until no common factor remains except 1. By multiplying all the divisors and the remaining numbers together, we arrive at the LCM in a simple and systematic way. Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw LCM by Division Method In this video, we explain how to find the LCM (Least Common Multiple) of two or more numbers using the division method. Step by step, you’ll see how we divide the given numbers simultaneously by prime numbers, continuing the process until no common factor remains except 1. By multiplying all the divisors and the remaining numbers together, we arrive at the LCM in a simple and systematic way. https://cdn.kastatic.org/ka-youtube-converted/xUqLnFBsBOI.mp4/xUqLnFBsBOI.mp4 364 Playing with numbers https://www.khanacademy.org/math/revision-term-1-tg-math-lass-6/x0ef789b44aba665e:week-2/x0ef789b44aba665e:playing-with-numbers/v/least-common-multiple-of-three-numbers-india 2025-03-28T07:16:04.402919306Z Least common multiple of three numbers Least common multiple of three numbers (Indian Accent) Aakash Bagga video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Least common multiple of three numbers Least common multiple of three numbers (Indian Accent) https://cdn.kastatic.org/ka-youtube-converted/OQIuQs3etno.mp4/OQIuQs3etno.mp4 324 Playing with numbers https://www.khanacademy.org/math/revision-term-1-mh-math-class-7/x0bdc8a5f9d8ec377:week-2/x0bdc8a5f9d8ec377:hcf-and-lcm/v/gcf-lcm-word-problems-indian-accent 2025-06-06T15:33:38.563209632Z GCF & LCM word problems Here we have a couple of word problems--one searching for the least common multiple and the other for the greatest common factor. Just read them with us slowly and follow along. You'll get it. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw GCF & LCM word problems Here we have a couple of word problems--one searching for the least common multiple and the other for the greatest common factor. Just read them with us slowly and follow along. You'll get it. https://cdn.kastatic.org/ka-youtube-converted/p8LZdAVSAxc.mp4/p8LZdAVSAxc.mp4 525 Playing with numbers https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:finding-common-ground/x063f95a40c290960:property-involving-both-the-hcf-and-the-lcm/v/hcf-and-lcm-product 2021-06-02T12:43:23Z HCF and LCM product The product of the HCF and LCM of two numbers is equal to the product of the two numbers. Let's use this property to solve a few questions. We will prove why this is true in another video. Created by Aanand Srinivas. Aanand Srinivas video https://cdn.kastatic.org/googleusercontent/nhWnKu9jwmpwN9fPih7rkjyV6Jl6hyKegqTSdU8jQedTbeilRSlcQHI-LhN0X7wwJwLdjBkDTkVTtOMPRTRmmdQ HCF and LCM product The product of the HCF and LCM of two numbers is equal to the product of the two numbers. Let's use this property to solve a few questions. We will prove why this is true in another video. Created by Aanand Srinivas. https://cdn.kastatic.org/ka-youtube-converted/ED8P8vchQJM.mp4/ED8P8vchQJM.mp4 475 Playing with numbers https://www.khanacademy.org/math/revision-tg-math-class-6/xf9df81a51b2787b9:week-1/xf9df81a51b2787b9:playing-with-numbers/e/revision-playing-with-numbers-tg-class-6 2026-02-18T21:20:35.275198076Z Revision playing with numbers TG class 6 . Khan Academy exercise