Quantitative Aptitude - Arithmetic Ability Questions

If xy = 22 and x2+ y2= 100, then what will be the value of (x + y)?

Amit donated 20% of his income to a school and deposited 20% of the remainder in his bank. If he is having Rs 12800 now, then what is the income (in Rs) of Amit?

A trader had 1200 kgs of rice. He sold a part of it at 5% profit and the rest at 11% profit, so that he made a total profit of 7%. How much (in kg) wheat did he sell at 5% profit?

If 2A = 3B = 8C; What is A : B : C?

P and Q can do a project in 6 and 12 days respectively. In how many days can they complete 25% of the project if they work together?

A trader had 630 kgs of rice. He sold a part of it at 15% profit and the rest at 8% profit, so that he made a total profit of 12%. How much rice (in kgs) did he sell at 8% profit?

If (1/cos θ) – (1/cot θ) = 1/P, then what is the value of cos θ?

If price of oranges is increased by 30%, then a person can buy 12 oranges less for Rs 208. What is the original price (in Rs) of an orange?