Page 1 - Assessment Subjective Ans
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Answers Subjective Assessment-4


               1.  Since, 6 = 2 × 3 and 10 = 5 × 2
















               2. 1 and the number itself are not included in the prime factorisation of a composite
               number.


               3. The greatest four digit number is 9999
               Therefore 9999 = 3 × 3 × 11 × 101



















               4. (a) 24 = 2 × 3 × 4
               Since, 4 is composite. Hence, prime factorisation has not been done.

               (b) 56 = 7 × 2 × 2 × 2

               Since, all the factors are prime. Hence, prime factorisation has been done.
               (c) 70 = 2 × 5 × 7

               Since, all the factors are prime. Hence, prime factorisation has been done.

               (d) 54 = 2 × 3 × 9
               Since, 9 is composite. Hence prime factorisation has not been done.

               5. Since, it is the smallest number. Therefore it will be the product of 4 smallest
               prime numbers. So the number will be 2 × 3 × 5 × 7 = 210.
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