Quantitative Aptitude - Arithmetic Ability Questions

Find the largest number of three digits exactly divisible by 15, 18, 27 and 30.

The two roots of a quadratic equation are given as x = 1/7 and x = -1/8 . The equation can be written as:

A trader had 16 quintals of wheat. He sold a part of it at 17% profit and the rest at 27% profit, so that he made a total profit of 21%. How much wheat did he sell at 27% profit?

The price of a product after getting 20% discount is Rs 3,024 which includes 5% tax on selling price. What was the marked price (in Rs) of the product?

Three friends J, K and L jog around a circular stadium and complete one round in 12, 18 and 20 seconds respectively. In how many minutes will all the three meet again at the starting point.

The selling price of 6 bananas is equal to the cost price of 8 bananas. Then the percentage of profit is

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?

Suppose n is a positive integer such that (n2+ 48) is a perfect square. What is the number of such n?