Tag: math & puzzles

After how many days will half of the pool be covered by the water-lily?

How old are John and Julia?

111,111,111 * 111,111,111 = 12,345,678,987,654,321

A company makes a profit equal to 25% of its sales. The profit is shared equally among the 4 owners of the company. If the company generates sales of $5,000,000, how much money does each one of the owners get?

A cylinder of radius 5 cm is inserted within a cylinder of radius 10 cm. The two cylinders have the same height of 20 cm. What is the volume of the region between the two cylinders?

A cone made of cardboard has a vertical height of 8 cm and a radius of 6 cm. If this cone is cut along the slanted height to make a sector, what is the central angle, in degrees, of the sector?

As x increases from Pi/4 to 3Pi/4, |sin(2x)|

If the sum of the repeating decimals 0.353535... + 0.252525... is written as a fraction in lowest terms, the product of the numerator and denominator is

The price x of a t-shirt was first reduced by 10%. Then the new price was reduced by a further 20%. The price of the T-shirt after the two reductions is given by