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SAI INTERNATIONAL SCHOOL


                                                   SUB: MATHEMATICS

                                                         CLASS - IV


                                            TOPIC: FACTORS AND MULTIPLES


                             SUB TOPIC: PRIME FACTORISATION (FACTOR TREE METHOD)

                     Practice Time:

                     SUBJECTIVE ASSESSMENT



               Find the prime factorisation using factor tree method.



               1. 42
               2. 54
               3. 120
               4. 625


                     OBJECTIVE ASSESSMENT
                     Use Factor Free Method
                   1.  List the prime factorization of 24.
                   a.  2x2x2x3            b. 2x2x5x3        c. 2x2x3       d. 2x2x3x3
                   2.  Find the prime factorisation of 30.
                   a.  2 X 2 X 5             b. 2 X 3 X 5      c. 2 X 5 X 5    d. 2 X 3 X 3
                   3.  Find the prime factorisation of 56.
                   a.  2 X 3X7             b. 2 X 2X2X7      c. 2 X 2 X 7    d. 2 X 3 X 3 X 7
                   4.  Find the prime factorisation of 38.
                   a.  2 X 19             b.  3 X19      c. 2 X 18    d. 3 X 18
                   5.  Find the prime factorisation of 108.
                   a.  2 X 2X3 X 3             b. 2 X 2 X 2 X 3 X 3      c. 2 X 3 X 3 X 3    d. 2 X 2 X 3 X 3 X 3
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