**Free online help**with math is one of the easiest ways to get instant help with math home work. Websites like

__tutorvista.com__,

__tutornext.com__and

__smartthinking.com__give students plenty of options to learn and engage in the subject. These sites and many more like them use math games, pop quizzes and examples related to sports and everyday situations to keep students interested. Free math help online is fast becoming a reliable source of math help and practice problems for students in school and college. Many sites also have discussion boards where users can post their queries and get them answered by qualified math solvers. These online communities are a great way for students to share and learn from each other. Since each person works individually, there is a lot of space to think about what is being done without worrying about any mistakes.

## Math Help Online for Free

Solved Example

**Question:**The sum of thrice the smaller is four times the larger, is 44. If one number is 4 more than another. What are the two numbers?

**Solution:**

Let x be the smaller number.

Then the larger number is 4 more = x + 4

The problem states,

3x + 4(x + 4) = 44

=> 3x + 4x + 16 = 44

=> 7x = 44 - 16

=> 7x = 28

=> x = 4

=>

Then the larger number is 4 more = x + 4

The problem states,

3x + 4(x + 4) = 44

=> 3x + 4x + 16 = 44

=> 7x = 44 - 16

=> 7x = 28

=> x = 4

=>

**Smaller number = 4**

**and****Larger number = 4 + 4 = 8**## Online Math Help Free

## Solved Examples

**Question 1:**Find the greatest common factor of 24, 40 and 60.

**Solution:**

Write the prime factorization of each given number

Factors of 24 = 2 × 2 × 2 × 3

Factors of 40 = 2 × 2 × 2 × 5

Factors of 60 = 2 × 2 × 3 × 5

=>

Factors of 24 = 2 × 2 × 2 × 3

Factors of 40 = 2 × 2 × 2 × 5

Factors of 60 = 2 × 2 × 3 × 5

=>

**GFC = 2 * 2 = 4****Question 2:**If the area of a circle is 25 pi square feet, find its circumference.

**Solution:**

The area of circle is given by,

A = 25 pi square feet

We know, Area = pi × r × r.

and circumference = 2 x pi x r

Therefore,

pi × r × r = 25 pi

r × r = 25

=> r = 5 feet ...................(1)

The circumference is,

2 × pi × r = 2 × pi × 5 = 10 pi feet

using equation (1)

=>

A = 25 pi square feet

We know, Area = pi × r × r.

and circumference = 2 x pi x r

Therefore,

pi × r × r = 25 pi

r × r = 25

=> r = 5 feet ...................(1)

The circumference is,

2 × pi × r = 2 × pi × 5 = 10 pi feet

using equation (1)

=>

**Circumference of circle = 10 pi feet.****Question 3:**A car moves at the speed of 81 km/hr. What is the speed of the car in meters per second?

**Solution:**

Speed of car = 81 km/hr

1 km = 1000 m

1 hr = 3600 sec

=> 81 km/hr = 81 x $\frac{1000}{3600}$ m/sec

= 81 x $\frac{5}{9}$ m/sec

= 45 m/sec

=>

1 km = 1000 m

1 hr = 3600 sec

=> 81 km/hr = 81 x $\frac{1000}{3600}$ m/sec

= 81 x $\frac{5}{9}$ m/sec

= 45 m/sec

=>

**Speed of car = 45 m/sec.**