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Peter has $2,500. He decides to donate x% of this money to orphans (where x is a two-digit number). However, due to some financial problems, he donates only y% of the money (where y is also a two-digit number obtained by reversing the digits of x). He donates $1,800 less than what he planned to donate. How much amount does he donate?
A total of 75 men can do a piece of work in 75 days by working for 8 hours per day. How many days will 25 women working 10 hours per day take to do the same work, if the efficiency of a man and a woman is in the ratio 3 : 2? (A) 150 days (B) 175 days (C) 212 days (D) 227 days (E) 270 days
A doctor examines 5 patients in 3 hours with a break of 10 minutes between two consecutive patients. He works for 10 hours and 15 minutes per day. How many patients does the doctor examine in a day? (A) 16 (B) 17 (C) 18 (D) 19 (E) 20
In what ratio should water be added to a liquid costing Rs. 12 per litre so as to make a profit of 25% by selling the diluted liquid at Rs. 13.75 per litre? (A) 12 : 11 (B) 1 : 11 (C) 3 : 5 (D) 4 : 1 (E) 11 : 1
From 200 litres of 80% concentrated milk, 30 litres is taken out and water is added. The new concentration of milk in the mixture is (A) 60% (B) 68% (C) 70% (D) 72% (E) 74%
A man buys spirit at a rate of Rs. 60 per litre, adds water to it and then sells it at Rs. 75 per litre. What is the ratio of the amounts of spirit and water, if the profit in the deal is 37.5%? (It can be assumed that water is free of cost.) (A) 9 : 1 (B) 10 : 1 (C) 11 : 1 (D) 11 : 9 (E) 11 : 10
A woman buys mangoes at Rs. 25 a dozen and an equal number at Rs. 30 a score. She sells them at Rs. 1.80 per piece and thus, gains Rs. 25 on her outlay. How many mangoes did she buy? (A) 3000 (B) 3200 (C) 3600 (D) 2500
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