oze","front":"A prime number has exactly [ ] factors: 1 and [ ].","back":"A prime number has exactly two factors: 1 and itself.","points":null},{"id":"a0be39cb-b514-46fa-b0c4-9ae14946fd87","cardType":"cloze","front":"A prime factorisation should never include [ ].","back":"A prime factorisation should never include 1.","points":null},{"id":"9f6890b4-23de-4a8a-9c87-4983b291beb8","cardType":"basic","front":"What does $2^3$ mean in index notation?","back":"$2 \\times 2 \\times 2$","points":1},{"id":"70c6459d-c8d2-481f-8792-7a03d3cd2ec9","cardType":"basic","front":"Write 84 as a product of prime factors.","back":"$84 = 2^2 \\times 3 \\times 7$","points":2},{"id":"435f02ee-b123-4fe5-a43a-129efb2faae2","cardType":"basic","front":"For HCF using prime factors, which primes do you keep?","back":"Primes that appear in every number.","points":1},{"id":"9647e6db-2a7a-41ee-b5bf-0e4bad72d5c7","cardType":"cloze","front":"For HCF, choose the [ ] power of each shared prime.","back":"For HCF, choose the smallest power of each shared prime.","points":null},{"id":"52f2c515-544a-4070-b0eb-0d0141e746d0","cardType":"basic","front":"Given $54 = 2 \\times 3^3$ and $126 = 2 \\times 3^2 \\times 7$, find the HCF.","back":"$18$","points":2},{"id":"8a391a7c-3c02-46bb-8573-b14c953875b6","cardType":"basic","front":"For LCM using prime factors, which primes do you include?","back":"Every prime that appears.","points":1},{"id":"53198437-caf0-413d-8407-a52924f82b89","cardType":"cloze","front":"For LCM, choose the [ ] power of each prime.","back":"For LCM, choose the largest power of each prime.","points":null},{"id":"2f1058cb-5ab9-4090-af68-9e05ab6741bb","cardType":"basic","front":"Given $45 = 3^2 \\times 5$ and $60 = 2^2 \\times 3 \\times 5$, find the LCM.","back":"$180$","points":2},{"id":"ade612c7-16d7-4459-b9d1-9df5a9510543","cardType":"basic","front":"Two regular events repeat at fixed intervals. What calculation gives the next time together?","back":"Find the LCM of the intervals.","points":1},{"id":"3553d10a-9d4e-4710-be69-fd58c3e46156","cardType":"cloze","front":"Before using LCM in a time question, put all intervals in [ ].","back":"Before using LCM in a time question, put all intervals in the same units.","points":null},{"id":"10f9f039-5eb9-4326-866d-186dcad4e826","cardType":"basic","front":"A tram and coach both arrive at 10:00, then every 9 and 12 minutes. When next together?","back":"10:36","points":2},{"id":"6e569dac-d1c1-44a6-827c-f9a40172ada3","cardType":"basic","front":"For $P = 2^3 \\times 3^2 \\times 5$ and $Q = 2^2 \\times 3 \\times 7$, find the HCF.","back":"$12$","points":2},{"id":"9f9e3807-949b-4fb2-9154-970b843f3c51","cardType":"basic","front":"For $P = 2^3 \\times 3^2 \\times 5$ and $Q = 2^2 \\times 3 \\times 7$, find the LCM.","back":"$2520$","points":2},{"id":"3d6f8207-bc99-478f-9a15-34dad4513b5b","cardType":"basic","front":"Given $12 = 2^2 \\times 3$, $18 = 2 \\times 3^2$, and $30 = 2 \\times 3 \\times 5$, find the HCF.","back":"$6$","points":2},{"id":"8acb834d-9475-4452-a156-a28d664d7e61","cardType":"basic","front":"Given $12 = 2^2 \\times 3$, $18 = 2 \\times 3^2$, and $30 = 2 \\times 3 \\times 5$, find the LCM.","back":"$180$","points":2},{"id":"cddf6bd4-d9ec-43db-9449-4756947ee129","cardType":"cloze","front":"Two numbers are coprime if their HCF is [ ].","back"

Prime Factors, HCF and LCM Flashcards

Prime Factors, HCF and LCM Flashcards

Prime Factors, HCF and LCM Flashcards

Prime Factors, HCF and LCM Flashcards