# Math Formulas, Practice, Tests, Forums, Free Help

#### What is new:

Calculating Angles (Will Haining)

Working in Time (Will Haining)

Direct and Inverse Proportion (Will Haining)

Direct and Inverse Proportion (Will Haining)

Reverse Percentages (Will Haining)

Area of Compound Shapes (Will Haining)

Interpreting Graphs and Charts (Will Haining)

Mean from grouped frequency tables (Will Haining)

Mean from a frequency table (Will Haining)

Working in Time (Will Haining)

Direct and Inverse Proportion (Will Haining)

Direct and Inverse Proportion (Will Haining)

Reverse Percentages (Will Haining)

Area of Compound Shapes (Will Haining)

Interpreting Graphs and Charts (Will Haining)

Mean from grouped frequency tables (Will Haining)

Mean from a frequency table (Will Haining)

Fill in the following figure with seven natural numbers so that the sum of the three numbers in each row, column, and two diagonal lines equals 21.
it is "huanfang" in chinese

#### Website Info

The website was created in September 2005.

It is visited by 25,000 - 35,000 people daily, mostly from USA, Bulgaria, Russia, India, Philippines, Ukraine, Serbia...

In 2011 was created a Russian version, and in 2015 Serbian.

It is visited by 25,000 - 35,000 people daily, mostly from USA, Bulgaria, Russia, India, Philippines, Ukraine, Serbia...

In 2011 was created a Russian version, and in 2015 Serbian.