{"product_id":"prime-factorisation-worksheet","title":"Primes and Prime Factorisation Mastery | Interactive Digital Lesson | 4 Units, 68 Questions | 11+ \u0026 GCSE","description":"\u003cp\u003e\u003cstrong\u003eBy the end of this lesson your child can break any number down into the primes that multiply to make it, decide whether a number is prime without guessing, and use a Venn diagram to find the HCF and LCM of two numbers far too big to list the factors of.\u003c\/strong\u003e Prime factorisation is the skill that quietly sits underneath HCF, LCM, surds and simplifying at GCSE, and it is built here from what a prime actually is.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTopics covered:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWhat makes a number prime, exactly two different factors, and why 1 does not count\u003c\/li\u003e\n\u003cli\u003eFinding the primes with a sieve, then testing a bigger number like 91 that looks prime and is not\u003c\/li\u003e\n\u003cli\u003eFactor trees, splitting a number all the way down until every branch ends on a prime\u003c\/li\u003e\n\u003cli\u003eIndex form, writing 360 as 2³ × 3² × 5\u003c\/li\u003e\n\u003cli\u003eHCF and LCM from prime factors, using a Venn diagram to sort the shared primes from the rest\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eYour child works through this lesson on any screen. They click to reveal each step of a worked example, try the practice questions on paper, then click to check their own answer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow it's structured:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEach unit opens with a worked example clicked through line by line, followed by practice questions colour-coded easy, medium and hard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e68 questions in total\u003c\/strong\u003e, every one click-to-reveal with a reveal-all option, plus a New Questions button that deals a fresh set each time\u003c\/li\u003e\n\u003cli\u003eA final 20-question mixed challenge pulling from all four units, plus 4 hands-on Explore tools built into the lesson\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe mistake this lesson is built to stop.\u003c\/strong\u003e When children put prime factors into a Venn diagram they drop every shared prime into the middle. If 144 has four 2s and 180 has two, only two of them are shared and the spare pair stays in the 144 circle. Get that wrong and the HCF and the LCM are both wrong. This lesson drops the primes into the diagram one at a time so your child can see exactly how many are shared.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eUse this if:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYour child is in Year 5 to Year 11 and needs primes and prime factorisation to become automatic\u003c\/li\u003e\n\u003cli\u003eYou're preparing for the 11+, where prime numbers and factor questions come up every year\u003c\/li\u003e\n\u003cli\u003eYour child is doing GCSE Foundation and needs product of primes, HCF and LCM secure\u003c\/li\u003e\n\u003cli\u003eYou want a resource your child can check their own work with, not one more thing on your to-do list\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eBuilt by an \u003cstrong\u003eexperienced maths teacher\u003c\/strong\u003e with over 3,000 hours of one-to-one tutoring experience and a Master's in Education.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBetter value as a bundle.\u003c\/strong\u003e This lesson is one of 3 in the \u003ca href=\"https:\/\/shlc-tutor.co.uk\/products\/factors-multiples-primes-bundle\"\u003eFactors, Multiples \u0026amp; Primes Bundle\u003c\/a\u003e, all 3 for £11.99 instead of £17.97 bought separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFormat:\u003c\/strong\u003e Interactive digital lesson, link sent by email straight after purchase.\u003cbr\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e Year 5 to Year 11, 11+, KS2, KS3, KS4, GCSE Foundation.\u003c\/p\u003e","brand":"SHLC-Tutors","offers":[{"title":"Default Title","offer_id":53524362363146,"sku":null,"price":5.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/7091\/9434\/files\/prime-factorisation-mastery-11-plus-gcse-interactive-lesson-v2.png?v=1786963429","url":"https:\/\/shlc-tutor.co.uk\/products\/prime-factorisation-worksheet","provider":"SHLC Tutors","version":"1.0","type":"link"}