If (x + 6y) = 8, and xy = 2, where x > O, what is the value of (x³+216y³)?

Find the solution of 5x-7=12? 

The numerator of a fraction is 3 more than the denominator. When 5 is added to the numerator and 2 is subtracted from the denominator, the fraction becomes $$8\over 3$$ . When the original fraction is divided by$$5{1\over 2}$$, the fraction so obtained is:

Direction: Read the following graph carefully and answer the following questions:
The following bar graph shows the quantity(in kg) of wheat, rice, pulses and salts sold by two companies P and Q in the month of January.

What is the ratio of the total quantity (in kg) of wheat and pulses sold by company P to company Q?

The area of the base of a right circular cone is 81 cm² and its height is 12 cm. What is the curved surface area (in cm2) of the cone?

A sum of money becomes Rs 16000 in 6 years at the rate of 25% per annum simple interest. What is the total interest for 6 years?

Ratio of speed of boat in down stream and speed of stream is 9:1, if speed of current is 3 km per  hr, then find distance travelled(in km) upstream in 5 hours.

A sold a watch to B at a profit of 20%. B sold it to C at 30% profit. C sold it to D at 10% loss. If B's profit is ₹80 more than that of A, then D bought it for: