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Year 7 Fractions Pretest - Widmer Question 1 Question 2 Nine is a multiple of 3. Three is a factor of 10. a) True a) True b) False b) False Question 3 Question 4 Factors of 12: 1, 12, 2, 6, 3, 4 LCM stands for: Factors of 18: 1, 18, 2, 9, 3, 6 a. lots of core memory b. likely common mistake Enter a number to complete the common factors of 12 c. lowest common multiple and 18. 1, 2, 3 and Question 5 Question 6 The number 15 has more than two factors: 1, 3, 5 and 15. Is the following statement true or false? Therefore it is called: A composite number has only two factors. a) a prime number a) True b) an even number b) False c) a palindrome d) a composite number Question 7 Question 8 74 = 7 × 7 × 7 × 7 The index in this calculation is Question 9 7 can be written in index notation as 7 . Question 10 True or false? A factor tree is used to find all the prime factors of a number. a)True b)False Use the factor tree to write 90 as a product of its prime factors. 90 = 2 × 3 × × 5 Question 11 What is the square root of 36? = Question 12 – =