Multiples and sub-multiples, abbreviations and indices

Explanation of question 6

3 x 103 x 2 x 103 is equal to

  1. 6 x 109
  2. 9 x 106
  3. 6 x 106
  4. 6 x 103

The answer is :- 3

3 x 2 = 6. Add indices, i.e. 106.

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