Which of the following is a perfect square as well as a cube ? 

A person bought some rice and wheat for ₹ 380. The ratio of weight of rice and wheat is 4 : 3 and the price of equal amount of rice and wheat is in the ratio 5 : 6. The rice was bought of worth 

What will be the value of x³+y³+z³-3xyz when x+y+z=9 and x²+y²+z²=31?

Shankar took a loan of Rs. 25,000 for purchasing a machine. How much amount will he repay after 1 year 6 months at annual rate of 12%, when interest is accumulated annually? 

The sum of squares of three numbers is 532. And the ratio of first to the second as also of the second to the third is 3:2. What is the second number?

Directions : What will come in the place of the question mark (?) in the following number series?

5040, 840, 168, 42, 14, ? , 7

B borrows 5,000 from A at 6 % p.a. simple interest and lends it to C at compound interest of 10 % p.a. If B collects the money back from C after 2 years and repays A, the profit made by B in the transaction is