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Question

15+13
  1. 1
  2. 74
  3. 715
  4. 815


Solution

The correct option is D 815
Consider the sum 15+13. We note that the LCM of 5 and 3 is 15.

Thus, 15+13=1×35×3+1×53×5

Thus, the given sum simplifies to 315+515= 815.

i.e., 15+13=815

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