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ISEE Middle Level Math : Numbers and Operations

Study concepts, example questions & explanations for ISEE Middle Level Math

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All ISEE Middle Level Math Resources

6 Diagnostic Tests 303 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

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Example Question #259 : Percentage

Find $30\%$ of 250 .

Possible Answers:

220

110

Correct answer:

Explanation:

To find a percentage of a whole number, we will multiply the percentage by the whole number. We get

$30\% \cdot 250$

$\frac{30}{100} \cdot 250$

$\frac{30}{100} \cdot \frac{250}{1}$

We can cancel the zeros to simplify. We get

$\frac{3}{10} \cdot \frac{250}{1}$

$\frac{3}{1} \cdot \frac{25}{1}$

$\frac{3 \cdot 25}{1 \cdot 1}$

$\frac{75}{1}$

Therefore, $30\%$ of 250 is .

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Example Question #260 : Percentage

What is $60\%$ of 350 ?

Possible Answers:

210

290

190

270

240

Correct answer:

210

Explanation:

To find the percentage of a whole number, we will multiply the percentage by the whole number.

$60\% \cdot 350$

$\frac{60}{100} \cdot 350$

$\frac{60}{100} \cdot \frac{350}{1}$

Now, we can cancel out the zeros. We get

$\frac{6}{10} \cdot \frac{350}{1}$

$\frac{6}{1} \cdot \frac{35}{1}$

$\frac{6 \cdot 35}{1 \cdot 1}$

$\frac{210}{1}$

210

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Example Question #931 : Numbers And Operations

What is 35% of 200 ?

Possible Answers:

155

Correct answer:

Explanation:

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

$35\% \cdot 200$

$\frac{35}{100} \cdot 200$

$\frac{35}{100} \cdot \frac{200}{1}$

We can cancel the zeros to make things easier.

$\frac{35}{1} \cdot \frac{2}{1}$

$\frac{35 \cdot 2}{1 \cdot 1}$

$\frac{70}{1}$

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Example Question #932 : Numbers And Operations

What is 75% of 300?

Possible Answers:

225

215

235

190

185

Correct answer:

225

Explanation:

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

$75\% \cdot 300$

$\frac{75}{100} \cdot 300$

$\frac{75}{100} \cdot \frac{300}{1}$

The zeros will cancel.

$\frac{75}{1} \cdot \frac{3}{1}$

$\frac{75 \cdot 3}{1 \cdot 1}$

$\frac{225}{1}$

225

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Example Question #933 : Numbers And Operations

What is 90% of 310?

Possible Answers:

269

279

280

273

284

Correct answer:

279

Explanation:

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

$90\% \cdot 310$

$\frac{90}{100} \cdot 310$

$\frac{90}{100} \cdot \frac{310}{1}$

Now, the zeros can cancel out. We get

$\frac{9}{10} \cdot \frac{310}{1}$

$\frac{9}{1} \cdot \frac{31}{1}$

$\frac{9 \cdot 31}{1 \cdot 1}$

$\frac{279}{1}$

279

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Example Question #71 : How To Find The Part From The Whole With Percentage

What is sixty percent of 50?

Possible Answers:

Correct answer:

Explanation:

Rewrite sixty percent as a fraction.

$60\% = \frac{60}{100} = \frac{3}{5}$

Multiply the fraction by the integer.

$\frac{3}{5}\cdot 50 = 30$

The answer is:

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Example Question #935 : Numbers And Operations

If Jim, Mike, and Chris share an investment, what percentage does Chris have if Mike and Jim each have $\%$ ?

Possible Answers:

$\%$

100 $\%$

$\%$

Correct answer:

$\%$

Explanation:

All parts of a whole must equal 100 $\%$ and to find one part, you must subtract the other known parts.

To find Chris's portion, you do 100-35-35=30 $\%$ .

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Example Question #171 : Ratios & Proportional Relationships

What is the sale price of a television if it is on sale for % off the original price of $\$175.00?$

Possible Answers:

$\$52.50$

$\$50.00$

$\$125.00$

$\$75.00$

$\$122.50$

Correct answer:

$\$52.50$

Explanation:

First, multiply:

$175.00\ast .70=122.50$

Then subtract that amount from the original price:

175.00-122.50=52.50

Answer: The sale price is $\$52.50$ .

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ISEE Middle Level Math : Numbers and Operations

Study concepts, example questions & explanations for ISEE Middle Level Math

All ISEE Middle Level Math Resources

Example Questions

Example Question #259 : Percentage

Example Question #260 : Percentage

Example Question #931 : Numbers And Operations

Example Question #932 : Numbers And Operations

Example Question #933 : Numbers And Operations

Example Question #71 : How To Find The Part From The Whole With Percentage

Example Question #935 : Numbers And Operations

Example Question #171 : Ratios & Proportional Relationships

All ISEE Middle Level Math Resources

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