A long rope has to be cut to make 23 small pieces. If it is double folded to start with, how many times does it need to be cut?
Question and options
A long rope has to be cut to make 23 small pieces. If it is double folded to start with, how many times does it need to be cut?
- 9
- 23
- 11
- 12
Answer and explanation
Correct answer: C - 11
When doubled, each cut goes through two strands, adding 2 pieces. Starting from 1 piece, k cuts give 2k+1 pieces; 2k+1=23 gives k=11.
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CUSAT CAT Five-Year LL.B.
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