Quantitative Aptitude - Arithmetic Ability Questions

Seven friends spent Rs 14 each on a project and the eighth friend spent Rs 21 more than the average expenditure of all eight of them. What is the amount of total money (in Rs) spent by them?

A shopkeeper marks up his wares by 80% and offers 20% discount. What will be the selling price (in Rs) if the cost price is Rs 450?

If θ is positive acute angle and 4sin2θ = 3, then the value of tan θ - cot θ/2 is

S and T can finish a work in 50 days. They worked together for 20 days and then left. How much of the work is left?

What is the least number of complete years in which a sum of money put out at 40% annual compound interest will be more than trebled?

A box weighs 8.5 kg when full of sand and weighs 5.5 kg when it is half filled with sand . Weight of the empty box is

There were 35 studentsina hostel.Ifthenumber of studentsbe increased by 7, the expenditure on food increases by Rs 42 per day while the average expenditure of studentsis reduced by Rs 1. What was the initial expenditure on food per day?

20 pens and 46 pencils were purchased for Rs. 235. If the average price of a pencil is Rs. 2.50 then calculate the average price (in Rs.) of a pen.