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exam in math

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I. Read each carefully. Write T if the statement is true and F if it is false. ( 10 pts ) ______ 1. 1 is a factor of any number ______ 2. Every number is a multiple of itself. ______ 3. Every number is a factor of 1. ______ 4. Every prime numbers is a factor of composite numbers. ______ 5. Odd number plus odd number equals odd number. ______ 6. Even number plus an even number equals an even number. ______ 7. A number is divisible by its factors. ______ 8. 12 is a multiple of 9. ______ 9. The GCF is the smallest number that divides the given numbers equally. ______ 10. The LCM is the highest common dividend. II. Choose and write the letter of the correct answer on the blank provided for. (5 pts.) ______ 1. Which equal to 30? A. 2 . 3. 5 C. 3. 3. 5 B. 2 . 2. 5 D. 2 . 5 . 5 ______ 2. Which expresses 42 as their product? A. 6 x 5 C. 6 x 7 B. 12 x 4 D. 8 x 9 ______ 3. Which are the factors of 60? A. 1, 2, 3, 10, 40, 60 C. 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 B. 1, 2, 3, 4, 15, 20 D. 1, 2, 3, 4, 5, 6, 10, 12, 15, 20,30,60 ______ 4. Which is the smallest prime? A. 0 C. 2 B. 1 D. 3
______ 5. Which equal to 2 . 2 . 3 . 3 . 5? A. 90 C. 150 B. 120 D. 180 III. Use the blank before the number for your answer. ( 10 pts ) ______ 1. What is the only even prime number.? ______ 2. What number is a factor of every number? ______ 3. How many prime number less than 100 end in 1? ______ 4. What is the sum of the fist 5 prime numbers? ______ 5. Seven is not a factor of N. What is the GCF of Seven and N? ______ 6. If 2² . 3 . 5 are the prime factors of x, what is x? ______ 7. Express 124 as a product of its prime factors. ______ 8. How many composite numbers are there between 20 and 30? ______ 9. Show that 20 can be a sum of 2 prime factors. ______ 10. Find the difference between the highest 2-digit prime and the lowest 2-digit prime. IV. Analyze and solve. Show your solution on the space provided for. ( 9pts. ) 1. Aling Bining has 152 g and 140 g of nuts that she wishes to put into bags. Each bag should hold the same number of grams and the largest number Possible. How many grams of nuts can she put into each bag? 2. Mrs. Miranda wants to bake brownies to be served to the visitors during her
Child’s
birthday party. The expected number of visitors is 12, 15 or 20. What is the least number of brownies that she needs to bake so that each of the visitors will be served with equal number of brownies? 3. In Barangay San Isidro, the women wash their clothes in the river. Aling Cora Washes everyday. Aling Medy washes every 2 days and Aling Lydia does it every 3 days. Yesterday, Tuesday, the three met in the river. When will be the next day When they will meet again?

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