Common Core: 6th Grade Math : Grade 6

Study concepts, example questions & explanations for Common Core: 6th Grade Math

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Example Questions

Example Question #1 : Ratios & Proportional Relationships

If candidate A receives \displaystyle 1 vote for every \displaystyle 3 votes that candidate B receives. At the end of the election candidate B has \displaystyle 320 votes. How many votes did candidate A get?

 

Possible Answers:

\displaystyle 960

\displaystyle 3

\displaystyle 1

\displaystyle 320

Correct answer:

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 1 vote cast for candidate A, candidate B got \displaystyle 3 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 1:3\rightarrow \frac{1}{3}

We know that candidate B received \displaystyle 320 votes. Write a new ratio.

\displaystyle A:320\rightarrow\frac{A}{320}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{1}{3}=\frac{A}{320}

Cross multiply and solve for \displaystyle A.

\displaystyle 3(A)=320(1)

Simplify.

\displaystyle 3A=320

Divide both sides of the equation by \displaystyle 3.

\displaystyle \frac{3A}{3}=\frac{320}{3}

Solve.

Example Question #2 : Ratios & Proportional Relationships

If candidate A receives \displaystyle 2 votes for every \displaystyle 5 votes that candidate B receives. At the end of the election candidate B has \displaystyle 320 votes. How many votes did candidate A get?

Possible Answers:

\displaystyle 128

\displaystyle 160

\displaystyle 132

\displaystyle 155

\displaystyle 282

Correct answer:

\displaystyle 128

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 2 votes cast for candidate A, candidate B got \displaystyle 5 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 2:5\rightarrow \frac{2}{5}

We know that candidate B received \displaystyle 320 votes. Write a new ratio.

\displaystyle A:320\rightarrow\frac{A}{320}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{2}{5}=\frac{A}{320}

Cross multiply and solve for \displaystyle A.

\displaystyle 5(A)=320(2)

Simplify.

\displaystyle 5A=640

Divide both sides of the equation by \displaystyle 5.

\displaystyle \frac{5A}{5}=\frac{640}{5}

Solve.

\displaystyle A=128

Example Question #3 : Ratios & Proportional Relationships

If candidate A receives \displaystyle 1 vote for every \displaystyle 5 votes that candidate B receives. At the end of the election candidate B has \displaystyle 320 votes. How many votes did candidate A get?

Possible Answers:

\displaystyle 410

\displaystyle 75

\displaystyle 335

\displaystyle 5

\displaystyle 64

Correct answer:

\displaystyle 64

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 1 vote cast for candidate A, candidate B got \displaystyle 5 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 1:5\rightarrow \frac{1}{5}

We know that candidate B received \displaystyle 320 votes. Write a new ratio.

\displaystyle A:320\rightarrow\frac{A}{320}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{1}{5}=\frac{A}{320}

Cross multiply and solve for \displaystyle A.

\displaystyle 5(A)=320(1)

Simplify.

\displaystyle 5A=320

Divide both sides of the equation by \displaystyle 5.

\displaystyle \frac{5A}{5}=\frac{320}{5}

Solve.

\displaystyle A=64

Example Question #4 : Grade 6

If candidate A receives \displaystyle 3 votes for every \displaystyle 5 votes that candidate B receives. At the end of the election candidate B has \displaystyle 300 votes. How many votes did candidate A get?

Possible Answers:

\displaystyle 100

\displaystyle 190

\displaystyle 99

\displaystyle 90

\displaystyle 180

Correct answer:

\displaystyle 180

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 3 votes cast for candidate A, candidate B got \displaystyle 5 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 3:5\rightarrow \frac{3}{5}

We know that candidate B received \displaystyle 300 votes. Write a new ratio.

\displaystyle A:300\rightarrow\frac{A}{300}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{3}{5}=\frac{A}{300}

Cross multiply and solve for \displaystyle A.

\displaystyle 5(A)=300(3)

Simplify.

\displaystyle 5A=900

Divide both sides of the equation by \displaystyle 5.

\displaystyle \frac{5A}{5}=\frac{900}{5}

Solve.

\displaystyle A=180

Example Question #5 : Grade 6

If candidate A receives \displaystyle 3 votes for every \displaystyle 6 votes that candidate B receives. At the end of the election candidate B has \displaystyle 255 votes. How many votes did candidate A get?

 

Possible Answers:

\displaystyle 123

\displaystyle 255

\displaystyle 6

\displaystyle 237

Correct answer:

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 3 votes cast for candidate A, candidate B got \displaystyle 6 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 3:6\rightarrow \frac{3}{6}

Reduce.

\displaystyle \frac{3}{6}=\frac{1}{2}

We know that candidate B received \displaystyle 255 votes. Write a new ratio.

\displaystyle A:320\rightarrow\frac{A}{255}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{1}{2}=\frac{A}{255}

Cross multiply and solve for \displaystyle A.

\displaystyle 2(A)=255(1)

Simplify.

\displaystyle 2A=255

Divide both sides of the equation by \displaystyle 2.

\displaystyle \frac{2A}{2}=\frac{255}{2}

Solve.

Example Question #2 : Grade 6

If candidate A receives \displaystyle 1 vote for every \displaystyle 2 votes that candidate B receives. At the end of the election candidate B has \displaystyle 300 votes. How many votes did candidate A get?

Possible Answers:

\displaystyle 160

\displaystyle 75

\displaystyle 310

\displaystyle 302

\displaystyle 150

Correct answer:

\displaystyle 150

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 1 vote cast for candidate A, candidate B got \displaystyle 2 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 1:2\rightarrow \frac{1}{2}

We know that candidate B received \displaystyle 300 votes. Write a new ratio.

\displaystyle A:300\rightarrow\frac{A}{300}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{1}{2}=\frac{A}{300}

Cross multiply and solve for \displaystyle A.

\displaystyle 2(A)=300(1)

Simplify.

\displaystyle 2A=300

Divide both sides of the equation by \displaystyle 2.

\displaystyle \frac{2A}{2}=\frac{300}{2}

Solve.

\displaystyle A=150

Example Question #3 : Grade 6

If candidate A receives \displaystyle 5 votes for every \displaystyle 3 votes that candidate B receives. At the end of the election candidate B has \displaystyle 320 votes. How many votes did candidate A get?

 

 
Possible Answers:

\displaystyle 500

\displaystyle 525

\displaystyle 357

Correct answer:

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 5 votes cast for candidate A, candidate B got \displaystyle 3 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 5:3\rightarrow \frac{5}{3}

We know that candidate B received \displaystyle 320 votes. Write a new ratio.

\displaystyle A:320\rightarrow\frac{A}{320}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{5}{3}=\frac{A}{320}

Cross multiply and solve for \displaystyle A.

\displaystyle 3(A)=320(5)

Simplify.

\displaystyle 3A=1600

Divide both sides of the equation by \displaystyle 3.

\displaystyle \frac{3A}{3}=\frac{1600}{3}

Solve.

Example Question #2 : Ratios & Proportional Relationships

 

 

If candidate A receives \displaystyle 5 votes for every \displaystyle 1 vote that candidate B receives. At the end of the election candidate B has \displaystyle 37 votes. How many votes did candidate A get?

 

Possible Answers:

\displaystyle 137

\displaystyle 135

\displaystyle 185

\displaystyle 42

\displaystyle 155

Correct answer:

\displaystyle 185

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 5 votes cast for candidate A, candidate B got \displaystyle 1 vote. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 5:1\rightarrow \frac{5}{1}

We know that candidate B received \displaystyle 37 votes. Write a new ratio.

\displaystyle A:37\rightarrow\frac{A}{37}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{5}{1}=\frac{A}{37}

Cross multiply and solve for \displaystyle A.

\displaystyle 1(A)=37(5)

Simplify and solve.

\displaystyle A=185

Example Question #9 : Grade 6

If candidate A receives \displaystyle 7 votes for every \displaystyle 4 votes that candidate B receives. At the end of the election candidate B has \displaystyle 38 votes. How many votes did candidate A get?

Possible Answers:

\displaystyle 42

\displaystyle 68

\displaystyle 39

\displaystyle 125

Correct answer:

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 7 votes cast for candidate A, candidate B got \displaystyle 4 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 7:4\rightarrow \frac{7}{4}

We know that candidate B received \displaystyle 38 votes. Write a new ratio.

\displaystyle A:38\rightarrow\frac{A}{38}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{7}{4}=\frac{A}{38}

Cross multiply and solve for \displaystyle A.

\displaystyle 4(A)=38(7)

Simplify.

\displaystyle 4A=266

Divide both sides of the equation by \displaystyle 4.

\displaystyle \frac{4A}{4}=\frac{266}{4}

Solve.

Example Question #31 : Ratio And Proportion

If candidate A receives \displaystyle 19 votes for every \displaystyle 9 votes that candidate B receives. At the end of the election candidate B has \displaystyle 77 votes. How many votes did candidate A get?

Possible Answers:

\displaystyle 169

\displaystyle 216

\displaystyle 129

\displaystyle 219

Correct answer:

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \displaystyle 19 votes cast for candidate A, candidate B got \displaystyle 9 votes. We can write the following ratio.

\displaystyle A:B\rightarrow\frac{A}{B}

Now substitute in the given numbers.

\displaystyle 19:9\rightarrow \frac{19}{9}

We know that candidate B received \displaystyle 77 votes. Write a new ratio.

\displaystyle A:77\rightarrow\frac{A}{77}

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\displaystyle \frac{19}{9}=\frac{A}{77}

Cross multiply and solve for \displaystyle A.

\displaystyle 9(A)=77(19)

Simplify.

\displaystyle 9A=1463

Divide both sides of the equation by \displaystyle 9.

\displaystyle \frac{9A}{9}=\frac{1463}{9}

Solve.

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