GED Math : GED Math

Study concepts, example questions & explanations for GED Math

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Example Questions

Example Question #431 : Numbers And Operations

On a map, the scale indicates that . If the distance between two cities is  on the map, how many miles apart are the two cities?

Possible Answers:

Correct answer:

Explanation:

From the given information, we can set up the following ratio:

, where  is the distance between the two cities.

Now, cross-multiply to solve for .

The two cities are  miles apart.

Example Question #431 : Ged Math

Solve the proportion:   

Possible Answers:

Correct answer:

Explanation:

Cross multiply both fractions.

Distribute the left side.

Subtract 21 from both sides.

Divide by 14 on both sides.

The answer is:  

Example Question #431 : Numbers And Operations

What is 18% of $50 ?

Possible Answers:

Correct answer:

Explanation:

To find a percentage of a whole number, we will multiply the two together. So, we get

 

 

 

The zero in 100 and the zero in 50 can cancel. We get

 

 

 

 

 

 

Therefore, 18% of $50 is $9.

Example Question #432 : Numbers And Operations

Solve:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the two fractions.

Divide by 8 on both sides.

Reduce the fractions.

The answer is:  

Example Question #433 : Numbers And Operations

What is  of ?

Possible Answers:

Correct answer:

Explanation:

Start by converting  to a decimal. To do this, move the decimal point to the left to spaces.

Now multiply by .

Example Question #434 : Numbers And Operations

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the two fractions.

Divide by 16 on both sides.

The answer is:  

Example Question #71 : Proportions And Percentages

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the two terms.

Simplify the terms.

Divide by 16 on both sides.

The answer is:  

Example Question #101 : Complex Operations

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply both fractions.

Divide by four on both sides.

The answer is:  

Example Question #102 : Complex Operations

Solve the proportion:  

Possible Answers:

Correct answer:

Explanation:

Cross multiply the two fractions.

Simplify the right side.

Subtract  on both sides.

Divide by negative seven on both sides.

The answer is:  

Example Question #71 : Proportions And Percentages

To make a certain shade of green, the blue paint and the yellow paint must be mixed in a ratio of . If a painter uses  gallons of yellow paint, how many gallons of blue paint must be used to create this shade of green?

Possible Answers:

Correct answer:

Explanation:

Let  be the gallons of blue paint needed. We can setup the following equation using the given ratio.

Cross-multiply and solve for .

The painter must use  gallons of blue paint.

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