Question

Between two book ends in your study are displayed your three favourite puzzle books. If you decide to arrange the three books in every possible combination and move just one book every minute how long would it take you?

• A. $6$ minutes
• B. $8$ minutes
• C. $10$ minutes
• D. $12$ minutes

Answer 1

The correct option is A $6$ minutes

Clearly, the number of ways of arranging $3$ books. $=3\times 2\times 1=6$
So, total time taken $=6$ minutes

Hence, option 'A' is correct.