Quantitative Aptitude - Arithmetic Ability Questions

A rice trader buys 8 quintals of rice for Rs 3,600. 10% rice is lost in transportation. At what rate should he sell to earn 15% profit?

The average temperature of Monday ,Tuesday , Wednesday and Thursday is 60°, The average for Tuesday, Wednesday, Thursday and Friday is 63°; If the ratio of temperature for Monday and Friday is 21 : 25, then what is the temperature of Friday ?

If a - b = 10 and ab =-21, then what is the value of a3-b3 ?

If 2/3(6x/5 - 1/4) + 1/3 = 9x/5, then what is the value of x?

If A has got 20% more marks than B, then by what percent marks of B are less than the marks of A?

Ticket for an adult is Rs 1600 and a child is Rs 600. 1 child goes free with two adults. If a group has 17 adults and 7 children what is the discount the group gets?

If Cos θ = 15/17 , then what is the value of Cosec θ?

If by increasing the price of a ticket in the ratio 8:11 the number of tickets sold fall in the ratio 23:21 then what is the increase (in Rs) in revenue if revenue before increase in price of ticket was Rs 36,800?