A man sold his watch at a 5% loss. If he had sold it for Rs. 56.25 more, he would have gained 10%. What was the cost price of the watch (in Rs.)?

Let the cost price be x. The difference between a 10 percent gain and a 5 percent loss is 15 percent of the cost price, which equals the additional Rs. 56.25. We calculate this as 0.15x = 56.25, which gives x = 56.25 / 0.15. The cost price of the watch is Rs. 375.

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