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# LCM and HCF

1. Which of these are multiples of 12
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2. The marks for each question depend on the difficulty (1 point, 2 points or 3 points). This exercise is marked out of 50. YOU WILL NEED YOUR BOOK AND A PEN TO DO YOUR WORKING OUT. I WILL WANT TO SEE IT. ___________________________________________________________________________________________________________________
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3. List in order the first 6 multiples of 8 greater than 60. (Put a dash between each number. E.g. 8-16-24-32-40)
3, 60, 6,
4. Which of these numbers are factors of 15 ?
3, 6, 9, 12, 1, 2, 3, 4, 6, 12, 24, 60, 125, 12, 48, 120,
5. Which of these numbers are multiples of 7 ?
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6. The Lowest Common Multiple of 8 and 20 is #.
10 and 3, 7 and 2, 5 and 4, 5 and 6,
7. Which list only contains multiples of 12 ?
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8. What is the highest common factor of 6ahc and 18ahg ?
online quizzes , active teaching ,
9. Which of these are factor-pairs of 30 ?
6, six, Six, , ,
10. The Lowest Common Multiple of 10 and 15 is #.
64-72-80-88-96-104, , ,
11. The number 20 has # factors.
3, 4, 2, 5,
12. The Highest Common Factor of 16 and 20 is #.
35, 7,000,000, 42, 84,
13. To find the LCM of two numbers, write out the times table of each number, then select the lowest, number that appears in both lists.
56-63-70-77-84, , online activities ,
14. What is the Lowest Common Multiple of 3 and 9 ?
27, 9, 18, 12,
15. The common factors of 12 and 48 are #
1 and 2, 1 and 2 and 4, 1 and 4 and 6, 2 and 6,
16. HIGHEST COMMON FACTOR AND LOWEST COMMON MULTIPLE This exercise will help you to prepare for the HCF and LCM section of Test 4. Have as many tries as you need until you get the exercise right. IMPORTANT: Read the hints and tips under the question mark %22?%22 carefully at the end; this is the most critical part of your revision. POST: Any questions or thoughts that occur to you in our FORUM and as a group we will answer them. ___________________________________________________________________________________________________________________
1, 2, 3, 12, 16, 1, 2, 4, 6, 1, 2, 3, 4, 6, 12, 1, 2, 12, 24,
17. List in order the factors of 48. (Put a dash between each number. E.g. 8-16-24-32-40)
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18. The Lowest Common Multiple of 11 and 3 is 66.
Thirty, 30, thirty, , ,
19. Two numbers called x and y have a Highest Common Factor of 1. This means that the Lowest Common Multiple of x and y is #.
6ah, , ,
20. The Highest Common Factor of 27 and 36 is #.
40, forty, Forty, , ,
21. What is the HCF of 5cd and 10c ?
18, 90, 270,
22. To find the highest common factor of two numbers, list all the factors of each number, then select the highest number, that appears in both lists.
4, four, Four, , ,
23. List in order the first 5 multiples of 7 greater than 50. (Put a dash between each number. E.g. 8-16-24-32-40)
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24. What is the HCF of 4gh and 6h ?
2x %2b 2y, xy, 2xy,
25. The Lowest Common Multiple of 9 and 30 is #.
TRUE, FALSE, ,
26. The common factors of 22 and 24 are #
5c, , ,
27. The number 8 has # factors.
2h, , online quizzes ,
28. The HCF of two numbers will be SMALLER than the LCM of the two numbers.
TRUE, FALSE, ,
29. The HCF of 3ab and 2ab is ab.
TRUE, FALSE quiz generator , ,