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Math 4 (SY 2010-2011) Second Trimester UT 1 A. Choose the correct answer from the list. Write your answer before each number. Composite Factors Product divisible prime one Greatest Common Factor Least Common Multiple multiples two _______________ 1. The numbers that we multiply. _______________ 2. A number greater than 1 that has exactly two factors: one and itself. _______________ 3. The largest number that are the common factors of two numbers. _______________ 4. A number greater than 1 with more than two factors. _______________ 5. The smallest number common to the list of multiples of two or more numbers. _______________ 6. The only even number that is prime. _______________ 7. It has only one factor. It is neither prime nor composite. _______________ 8. A number is __ by another number if the remainder is 0. _______________ 9. A number that is a factor of any given number. _______________ 10. The product obtained when a counting number is multiplied by a given number. B. List down all factors of the following: 1. 8 ______________________ 6. 48 ______________________ 2. 18 _____________________ 7. 72 ______________________ 3. 26 _____________________ 8. 56 ______________________ 4. 36 _____________________ 9. 63 ______________________ 5. 42 _____________________ 10. 150 _____________________ C. List down the first 10 multiples of the following: 1. 6 ______________________ 6. 32 ______________________ 2. 7 ______________________ 7. 8 _______________________ 3. 14 _____________________ 8. 30 ______________________ 4. 18 _____________________ 9. 60 ______________________ 5. 25 _____________________ 10. 75 ______________________ D. Identify whether the numbers below are prime or composite. 6. 2 ______________________ 6. 57 ______________________ 7. 27 _____________________ 7. 91 _______________________ Page 1 of 6 (RFBaluyut, ACHS2018) Math 4 (SY 2010-2011) Second Trimester UT 1 8. 51 _____________________ 8. 89 ______________________ 9. 67 _____________________ 9. 87 ______________________ 10. 59 _____________________ 10. 97 ______________________ E. True or False: Write true if it is correct and false if it is wrong. _____________ 1. Every number is a multiple of itself. _____________ 2. 1 is a multiple of every number. _____________ 3. Every number is a factor of itself. _____________ 4. 1 is a factor of every number. _____________ 5. Every number is a multiple of 1. _____________ 6. Every number is a factor of 1. _____________ 7. 6 is a factor of 9. _____________ 8. 9 is a multiple of 6. _____________ 9. 5 is a factor of 10. _____________ 10. If the first number is a factor of the second number, then The second number is a multiple of the first number. F. Do the prime factorization of the following numbers using the Factor Tree Method. 1. 39 2. 48 4. 120 5. 450 3. 57 6. 225 G. Use Decomposition Method to express the following numbers as a product of prime factors. 1. 56 2. 180 3. 312 Page 2 of 6 (RFBaluyut, ACHS2018) Math 4 (SY 2010-2011) Second Trimester UT 1 4. 78 5. 95 6. 1026 H. Find the GCF. Use Decomposition Method: 1. 18, 78, 198 GCF = ___________ 2. 54, 12, 84 GCF = ___________ 3. 12, 16, 18 GCF = ___________ Use Listing Method: 4. 20, 30, 50, 40 GCF = ___________ 5. 16, 32, 48 GCF = ___________ 6. 48, 56, 64 GCF = ___________ Use Factor Tree: 7. 28, 42, 70 GCF = ___________ Page 3 of 6 (RFBaluyut, ACHS2018) Math 4 (SY 2010-2011) Second Trimester UT 1 8. 60, 96, 108 GCF = ___________ 9. 52, 65 GCF = ___________ I. Find the LCM:. Use Listing Method: 1. 15 = ___________________ LCM = ___________ 180= __________________ 2. 42 = ___________________ LCM = ___________ 56 ___________________ 3. 96 = ____________________ LCM = ___________ 212 = ___________________ Use Factor Tree Method: 4. 24 = ____________________ LCM = ___________ 48 = ____________________ 128 = ___________________ 5. 52 = ____________________ LCM = ___________ 65 = ____________________ 91 = ____________________ 6. 18 = ____________________ LCM = ___________ 78 = ____________________ 98 = ____________________ Use Decomposition Method: 7. 18, 45, 75 8. 12, 30, 44 9. 24, 60, 90 Page 4 of 6 (RFBaluyut, ACHS2018) Math 4 (SY 2010-2011) Second Trimester UT 1 J. Problem Solving: 1. Jilleen is the younger sister of Jessica. Their ages are the same as the prime factorization of 85. How old is Jilleen? How old is Jessica? 2. Three ribbons with lengths: 180 cm, 225 cm and 270 cm, are to be cut into pieces of equal lengths. What is the longest possible length of the ribbons without wasting any part? 3. Mangoes are being harvested in an orchard. If the mangoes are to be packed in 30, 40 or 80 pieces per bag, what is the least number of mangoes possible so that no mango will be left out? 4. Anne is arranging her photographs in rows. If she has 52 photographs in one box and 68 photographs in another box, how many photographs should there be in a row so that there will be no left over and the number of rows will be the fewest possible? 5. A jar contains some cookies. If Bea gets 7 pieces each time, there will be 6 cookies left. If she gets 8 pieces each time, no cookie will be left. What is the least possible number of cookies in the jar? K. Classify the given fractions. Choose from the words inside the box. Write the letter only. A. Similar Fraction B. Dissimilar Fractions C. Proper Fraction D. Mixed Number E. Improper Fraction F. Unit Fractions Page 5 of 6 (RFBaluyut, ACHS2018) Math 4 (SY 2010-2011) Second Trimester UT 1 ____ 1. _____ 6. 5 6 21 21 _____ 2. _____ 7. 8 6 8 28 _____ 3. 15 28 24 28 _____ 8. 15 1 3 _____ 4. 13 27 25 34 3 4 2 3 1 5 3 7 _____ 9. 42 16 _____ 5. _____ 10. 1 12 5 L. Matching Type: 5 7 ________ 1. Fractions less than 1 A. Similar Fraction ________ 2. Number of equal parts considered B. Denominator ________ 3. A part of a whole C. Improper ________ 4. Fraction with the same denominators D. Numerator ________ 5. Number of parts the whole is divided. E. Fractions ________ 6. Fraction equal to 1 or greater F. Proper Fraction M. Write as mixed numbers or whole numbers: ________ 1. 12/5 ________ 6. 40/8 ________ 2. 16/7 ________ 7. 60/5 ________ 3. 21/5 ________ 8. 75/5 ________ 4. 18/4 ________ 9. 90/4 ________ 5. 32/6 ________ 10. 112/15 N. Express as improper fractions: ________ 1. 5 1/2 ________ 6. 15 3/4 ________ 2. 3 3/9 ________ 7. 9 4/9 ________ 3. 9 1/4 ________ 8. 7 3/8 ________ 4. 12 2/3 ________ 9. 24 5/7 ________ 5. 8 7/8 ________ 10. 6 5/6 Page 6 of 6 (RFBaluyut, ACHS2018)