6085 − 4017 + 1496 − 1124 = ?

40 ÷ 0.80 ÷ 0.25 = ?

A contractor agreeing to finish a work in 150 days employed 75 men, each working for 8 h daily. After 90 days only 2/7 of the work was completed. How many more men would be put on now, each working 10 h daily so as to finish the work in the stipulated time?

45% of √225 + 21 = ?

A horse worth Rs. 9000 is sold by A to B at a loss of 10%. B sells the horse back to A at 10% gain. The result is

If the diameter of a cylinder is 20 cm and its height is 20 cm, then the surface area (in cm²) is

The banks of a river are parallel. A swimmer starts from a point on one of the banks and swims in a straight line inclined to the bank at 45° and reaches the opposite bank which is 20 m from the starting point. The breadth of the river is

A retailer buys 30 pens from a wholesaler and pays equal to marked price of 27 pens. If he sells the pens at the marked price, his profit per cent in the transaction is

The prices of sugar increase by 32%. A family reduces its consumption so that the expenditure on sugar is up only by 10%. If the total consumption of sugar before the price-rise was 10 kg per month, then the consumption of sugar per month at present, in kg, is