Page 1 - Assessment Subjective Ans
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Answers Subjective Assessment-1


               1. (a) 24
               24 = 1 × 24 24 = 2 × 12 24 = 3 × 8

               24 = 4 × 6 24 = 6 × 4

               Stop here since 4 and 6 have occurred earlier
               Hence, the factors of 24 are 1, 2, 3, 4, 6, 8, 12 and 24.

               2. (a) The required multiples are:

               5 × 1 = 5
               5 × 2 = 10

               5 × 3 = 15
               5 × 4 = 20

               5 × 5 = 25

               Hence, the first five multiples of 5 are 5, 10, 15, 20 and 25.
               3. (a) 20 and 28

               1, 2, 4, 5, 10 and 20 are factors of 20

               1, 2, 4, 7, 14 and 28 are factors of 28
               Common factors = 1, 2, 4

               (b) 15 and 25

               1, 3, 5 and 15 are factors of 15
               1, 5 and 25 are factors of 25

               Common factors = 1, 5.

               4. Multiples of 3 are 3, 6, 9, 12, 15
               Multiples of 4 are 4, 8, 12, 16, 20

               Common multiples are 12, 24, 36, 48, 60, 72, 84 and 96.

               5. Since, the number is divisible by 12. Hence, it also divisible by its factors i.e 1, 2,
               3, 4, 6, 12
               Therefore 1, 2, 3, 4, 6 are the numbers other than 12 by which this number is also
               divisible.
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