https://www.khanacademy.org/math/revision-term-1-tg-math-lass-6/x0ef789b44aba665e:week-2/x0ef789b44aba665e:playing-with-numbers/v/prime-factorization-indian-accent 2025-06-06T15:33:38.563209632Z Prime factorization This video explains the concept of prime numbers and how to find the prime factorization of a number using a factorization tree. It also shows how to write the prime factorization using exponential notation. A prime number is a number that is only divisible by itself and one. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Prime factorization This video explains the concept of prime numbers and how to find the prime factorization of a number using a factorization tree. It also shows how to write the prime factorization using exponential notation. A prime number is a number that is only divisible by itself and one. https://cdn.kastatic.org/ka-youtube-converted/kSaUsBYCAms.mp4/kSaUsBYCAms.mp4 250 HCF and LCM 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 HCF and LCM https://www.khanacademy.org/math/class-7-ncf/x063f95a40c290960:finding-common-ground/x063f95a40c290960:hcf/v/greatest-common-factor-explained-indian-accent 2025-06-06T15:33:38.563209632Z Greatest common factor explained The greatest common divisor (GCD) and greatest common factor (GCF) are the same thing. To find the GCD/GCF of two numbers, list their factors, identify the common factors, and choose the largest one. For example, the GCD/GCF of 12 and 8 is 4. Numbers with a GCD/GCF of 1 are called relatively prime. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Greatest common factor explained The greatest common divisor (GCD) and greatest common factor (GCF) are the same thing. To find the GCD/GCF of two numbers, list their factors, identify the common factors, and choose the largest one. For example, the GCD/GCF of 12 and 8 is 4. Numbers with a GCD/GCF of 1 are called relatively prime. https://cdn.kastatic.org/ka-youtube-converted/ZPSLKiFj4zU.mp4/ZPSLKiFj4zU.mp4 386 HCF and LCM https://www.khanacademy.org/math/revision-mh-math-class-6/x01cb2212e31ce997:decimal-fractions/x01cb2212e31ce997:divisibility-hcf-lcm/v/least-common-multiple-indian-accent 2025-06-05T06:01:43.515132284Z Least common multiple The least common multiple (LCM) is the smallest number that two or more numbers can divide into evenly. To find the LCM, you can use the prime factorization method or list the multiples of each number. Prime factorization involves breaking down numbers into their prime factors and constructing the smallest number with all the factors. Listing multiples involves finding the smallest shared multiple. Both methods help find the LCM of numbers like 18 and 12. Skyloom (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Least common multiple The least common multiple (LCM) is the smallest number that two or more numbers can divide into evenly. To find the LCM, you can use the prime factorization method or list the multiples of each number. Prime factorization involves breaking down numbers into their prime factors and constructing the smallest number with all the factors. Listing multiples involves finding the smallest shared multiple. Both methods help find the LCM of numbers like 18 and 12. https://cdn.kastatic.org/ka-youtube-converted/hAaZD9T7xJk.mp4/hAaZD9T7xJk.mp4 265 HCF and LCM 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 HCF and LCM 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 HCF and LCM 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 HCF and LCM https://www.khanacademy.org/math/revision-mh-math-class-7/xa11c0f43538c6736:week-1/xa11c0f43538c6736:hcf-and-lcm/e/revision-hcf-and-lcm-mh-class-7 2026-01-28T03:50:33.306290623Z Revision HCF and LCM MH class 7 . Khan Academy exercise