Answer: A Let the cost price of machine be Rs 100 SP of machine at a profit of 10% = Rs 110 SP of machine at a loss of 10% = Rs 90 If SP is Rs 20 less, then CP = Rs 100 If SP is Rs 40 less, then CP = 100/20 * 40 = Rs 200

Q. No. 3:

If the cost of 12 pencils is equal to the selling price of 10 pencils, the profit percent in the transaction is

Answer: D In such transaction where SP is same and also gain % and loss % is same there is always a loss and such loss % => (common gain or loss % / 10)^{2} = (10/10)^{2} = 1% loss

Q. No. 5:

The retail price of a water geyser is Rs 1265. If the manufacturer gains 10%, the wholesale dealer gains 15% and the retailer gains 25%, then the cost of the product is

Answer: A Let CP of geyser be Rs x then, x*1.1*1.15*1.25 = Rs 1265 => x= Rs 800.

Q. No. 6:

A trader wants 10% profit on the selling price of a product whereas his expenses amount to 15% on sales. What should his rate of mark up be on an article of Rs 9?

Answer: D Let the SP of an article be Rs x. Expenses = 15% of x = 0.15x Profit = 10% of x = 0.10x CP = Rs 9 (given) 9 + 0.15x+0.10x = x => x= 12 % increase for make up price = (12-9)/9 * 100 = 100/3= 33.33%