Number, NAPX-I4-CA28 SA

Question

{{{question}}}

Worked Solution

{{{workedSolution}}}

Variant 0

DifficultyLevel

696

Question

Mr. Soros put $2000 into a simple interest account for a year.

He did not take any money out or add any money to the account.

At the end of the year he had $2080 in the account.

What was the annual percentage interest rate?

Worked Solution
Interest earned = 2080 − 2000
= $80

∴\therefore Annual interest rate
= 802000 ×\dfrac{80}{2000} \ \times 100
= 4%

Question Type

Answer Box

Variables

Variable nameVariable value
question
Mr. Soros put $2000 into a simple interest account for a year. He did not take any money out or add any money to the account. At the end of the year he had $2080 in the account. What was the annual percentage interest rate?
workedSolution
| | | | --------------------- | -------------- | | Interest earned | \= 2080 − 2000 | | | \= $80 |

sm_nogap $\therefore$ Annual interest rate
>>||| |-|-| ||= $\dfrac{80}{2000} \ \times$ 100| ||= {{{correctAnswer0}}}{{{suffix0}}}|
correctAnswer0
4
prefix0
suffix0
%

Answers

Specify one or more 'ANSWER' block(s) as exampled below.
Note: correctAnswer is required, the rest are optional. ("correctAnswer" is what the student would need to type in to the box to get the answer correct.)

For example:
correctAnswer: 123.40

And optionally, specify the following, but only if you need something different to the defaults: 'width' defaults to 5 if not present, and valid values are 3 to 10; 'prefix' and 'suffix' default to nothing if not present.
prefix: $
suffix: mm$^2$
width: 5

correctAnswerNcorrectAnswerValueAnswer
correctAnswer04

%

Variant 1

DifficultyLevel

703

Question

Ms Reinhart put $3000 into a simple interest account for a year.

She did not take any money out or add any money to the account.

At the end of the year she had $3090 in the account.

What was the annual percentage interest rate?

Worked Solution
Interest earned = 3090 − 3000
= $90

∴\therefore Annual interest rate
= 903000 ×\dfrac{90}{3000} \ \times 100
= 3%

Question Type

Answer Box

Variables

Variable nameVariable value
question
Ms Reinhart put $3000 into a simple interest account for a year. She did not take any money out or add any money to the account. At the end of the year she had $3090 in the account. What was the annual percentage interest rate?
workedSolution
| | | | --------------------- | -------------- | | Interest earned | \= 3090 − 3000 | | | \= $90 |

sm_nogap $\therefore$ Annual interest rate
>>||| |-|-| ||= $\dfrac{90}{3000} \ \times$ 100| ||= {{{correctAnswer0}}}{{{suffix0}}}|
correctAnswer0
3
prefix0
suffix0
%

Answers

Specify one or more 'ANSWER' block(s) as exampled below.
Note: correctAnswer is required, the rest are optional. ("correctAnswer" is what the student would need to type in to the box to get the answer correct.)

For example:
correctAnswer: 123.40

And optionally, specify the following, but only if you need something different to the defaults: 'width' defaults to 5 if not present, and valid values are 3 to 10; 'prefix' and 'suffix' default to nothing if not present.
prefix: $
suffix: mm$^2$
width: 5

correctAnswerNcorrectAnswerValueAnswer
correctAnswer03

%

Variant 2

DifficultyLevel

706

Question

Mr. Musk put $4000 into a simple interest account for a year.

He did not take any money out or add any money to the account.

At the end of the year he had $4100 in the account.

What was the annual percentage interest rate?

Worked Solution
Interest earned = 4100 − 4000
= $100

∴\therefore Annual interest rate
= 1004000 ×\dfrac{100}{4000} \ \times 100
= 2.5%

Question Type

Answer Box

Variables

Variable nameVariable value
question
Mr. Musk put $4000 into a simple interest account for a year. He did not take any money out or add any money to the account. At the end of the year he had $4100 in the account. What was the annual percentage interest rate?
workedSolution
| | | | --------------------- | -------------- | | Interest earned | \= 4100 − 4000 | | | \= $100 |

sm_nogap $\therefore$ Annual interest rate
>>||| |-|-| ||= $\dfrac{100}{4000} \ \times$ 100| ||= {{{correctAnswer0}}}{{{suffix0}}}|
correctAnswer0
2.5
prefix0
suffix0
%

Answers

Specify one or more 'ANSWER' block(s) as exampled below.
Note: correctAnswer is required, the rest are optional. ("correctAnswer" is what the student would need to type in to the box to get the answer correct.)

For example:
correctAnswer: 123.40

And optionally, specify the following, but only if you need something different to the defaults: 'width' defaults to 5 if not present, and valid values are 3 to 10; 'prefix' and 'suffix' default to nothing if not present.
prefix: $
suffix: mm$^2$
width: 5

correctAnswerNcorrectAnswerValueAnswer
correctAnswer02.5

%

Variant 3

DifficultyLevel

698

Question

Penelope put $2500 into a simple interest account for a year.

She did not take any money out or add any money to the account.

At the end of the year she had $2600 in the account.

What was the annual percentage interest rate?

Worked Solution
Interest earned = 2600 − 2500
= $100

∴\therefore Annual interest rate
= 1002500 ×\dfrac{100}{2500} \ \times 100
= 4%

Question Type

Answer Box

Variables

Variable nameVariable value
question
Penelope put $2500 into a simple interest account for a year. She did not take any money out or add any money to the account. At the end of the year she had $2600 in the account. What was the annual percentage interest rate?
workedSolution
| | | | --------------------- | -------------- | | Interest earned | \= 2600 − 2500 | | | \= $100 |

sm_nogap $\therefore$ Annual interest rate
>>||| |-|-| ||= $\dfrac{100}{2500} \ \times$ 100| ||= {{{correctAnswer0}}}{{{suffix0}}}|
correctAnswer0
4
prefix0
suffix0
%

Answers

Specify one or more 'ANSWER' block(s) as exampled below.
Note: correctAnswer is required, the rest are optional. ("correctAnswer" is what the student would need to type in to the box to get the answer correct.)

For example:
correctAnswer: 123.40

And optionally, specify the following, but only if you need something different to the defaults: 'width' defaults to 5 if not present, and valid values are 3 to 10; 'prefix' and 'suffix' default to nothing if not present.
prefix: $
suffix: mm$^2$
width: 5

correctAnswerNcorrectAnswerValueAnswer
correctAnswer04

%

Variant 4

DifficultyLevel

707

Question

Mr. Packer put $8000 into a simple interest account for a year.

He did not take any money out or add any money to the account.

At the end of the year he had $8280 in the account.

What was the annual percentage interest rate?

Worked Solution
Interest earned = 8280 − 8000
= $280

∴\therefore Annual interest rate
= 2808000 ×\dfrac{280}{8000} \ \times 100
= 3.5%

Question Type

Answer Box

Variables

Variable nameVariable value
question
Mr. Packer put $8000 into a simple interest account for a year. He did not take any money out or add any money to the account. At the end of the year he had $8280 in the account. What was the annual percentage interest rate?
workedSolution
| | | | --------------------- | -------------- | | Interest earned | \= 8280 − 8000 | | | \= $280 |

sm_nogap $\therefore$ Annual interest rate
>>||| |-|-| ||= $\dfrac{280}{8000} \ \times$ 100| ||= {{{correctAnswer0}}}{{{suffix0}}}|
correctAnswer0
3.5
prefix0
suffix0
%

Answers

Specify one or more 'ANSWER' block(s) as exampled below.
Note: correctAnswer is required, the rest are optional. ("correctAnswer" is what the student would need to type in to the box to get the answer correct.)

For example:
correctAnswer: 123.40

And optionally, specify the following, but only if you need something different to the defaults: 'width' defaults to 5 if not present, and valid values are 3 to 10; 'prefix' and 'suffix' default to nothing if not present.
prefix: $
suffix: mm$^2$
width: 5

correctAnswerNcorrectAnswerValueAnswer
correctAnswer03.5

%

Variant 5

DifficultyLevel

712

Question

Kate put $7500 into a simple interest account for a year.

She did not take any money out or add any money to the account.

At the end of the year she had $7743.75 in the account.

What was the annual percentage interest rate?

Worked Solution
Interest earned = 7743.75 − 7500
= $243.75

∴\therefore Annual interest rate
= 243.757500 ×\dfrac{243.75}{7500} \ \times 100
= 3.25%

Question Type

Answer Box

Variables

Variable nameVariable value
question
Kate put $7500 into a simple interest account for a year. She did not take any money out or add any money to the account. At the end of the year she had $7743.75 in the account. What was the annual percentage interest rate?
workedSolution
| | | | --------------------- | -------------- | | Interest earned | \= 7743.75 − 7500 | | | \= $243.75 |

sm_nogap $\therefore$ Annual interest rate
>>||| |-|-| ||= $\dfrac{243.75}{7500} \ \times$ 100| ||= {{{correctAnswer0}}}{{{suffix0}}}|
correctAnswer0
3.25
prefix0
suffix0
%

Answers

Specify one or more 'ANSWER' block(s) as exampled below.
Note: correctAnswer is required, the rest are optional. ("correctAnswer" is what the student would need to type in to the box to get the answer correct.)

For example:
correctAnswer: 123.40

And optionally, specify the following, but only if you need something different to the defaults: 'width' defaults to 5 if not present, and valid values are 3 to 10; 'prefix' and 'suffix' default to nothing if not present.
prefix: $
suffix: mm$^2$
width: 5

correctAnswerNcorrectAnswerValueAnswer
correctAnswer03.25

%

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