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ISEE Middle Level Math : ISEE Middle Level (grades 7-8) Mathematics Achievement

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

Example Question #37 : Mean

Find the mean in this set of numbers:

$\displaystyle 7890, 7980, 7880, 7890, 7990$

Possible Answers:

7920 $\displaystyle 7920$

7826 $\displaystyle 7826$

7990 $\displaystyle 7990$

7926 $\displaystyle 7926$

Correct answer:

7926 $\displaystyle 7926$

Explanation:

First, add all the numbers in the set:

$\displaystyle 7890+7980+7880+7890+7990=39630$

Then, divide by the total amount of numbers in the set:

$39630\div5=7926$ $\displaystyle 39630\div5=7926$

Answer: The mean is 7926 $\displaystyle 7926$

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Example Question #601 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Find the mean of this set of numbers:

$\displaystyle 1185, 1518, 1158, 1581, 1851, 1581, 1815$

Possible Answers:

1581 $\displaystyle 1581$

1515 $\displaystyle 1515$

1518 $\displaystyle 1518$

1527 $\displaystyle 1527$

Correct answer:

1527 $\displaystyle 1527$

Explanation:

First, add all the numbers in this set:

$\displaystyle 1185+ 1518+ 1158+ 1581+ 1851+ 1581+ 1815=10689$

Then, divide by the total amount of numbers in the set: $10689 \div 7=1527$ $\displaystyle 10689 \div 7=1527$

Answer: The mean is 1527 $\displaystyle 1527$.

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Example Question #41 : Mean

What is the mean of the following numbers?

$\displaystyle 14,22,12,11,13,6$

Possible Answers:

13.5 $\displaystyle 13.5$

$\displaystyle 15$

$\displaystyle 16$

$\displaystyle 13$

Correct answer:

$\displaystyle 13$

Explanation:

The mean is determined by calculating the sum of all values divided by the total number of values:
$mean=\frac{\sum_n}{n}=\frac{14+22+12+11+13+6}{6}=\frac{78}{6}=13$ $\displaystyle mean=\frac{\sum_n}{n}=\frac{14+22+12+11+13+6}{6}=\frac{78}{6}=13$

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Example Question #601 : Isee Middle Level (Grades 7 8) Mathematics Achievement

What is the average of the numbers in this set?

$\displaystyle 1150, 1510, 1552$

Possible Answers:

402 $\displaystyle 402$

1510 $\displaystyle 1510$

1404 $\displaystyle 1404$

Correct answer:

1404 $\displaystyle 1404$

Explanation:

First add all three numbers:

$\displaystyle 1150+1510+1552=4212$

Then divide by $\displaystyle 3$:

$4212\div3=1404$ $\displaystyle 4212\div3=1404$

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Example Question #602 : Isee Middle Level (Grades 7 8) Mathematics Achievement

What is the range in this set of numbers?

$\displaystyle 1150, 1550, 1510$

Possible Answers:

400 $\displaystyle 400$

1500 $\displaystyle 1500$

1510 $\displaystyle 1510$

1150 $\displaystyle 1150$

Correct answer:

400 $\displaystyle 400$

Explanation:

Order the numbers from least to greatest:

$\displaystyle 1150, 1510, 1550$

Then subtract the smallest number from the largest number: $\displaystyle 1550-1150=400$

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Example Question #603 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Find the mean in this set of numbers:

$\displaystyle 654, 645, 646, 656, 655, 664, 644$

Possible Answers:

650 $\displaystyle 650$

652 $\displaystyle 652$

644 $\displaystyle 644$

655 $\displaystyle 655$

Correct answer:

652 $\displaystyle 652$

Explanation:

First add all the numbers in this set:

$\displaystyle 654+ 645+ 646+ 656+655+664+644=4564$

Then divide by $\displaystyle 7$:

$4564\div 7=652$ $\displaystyle 4564\div 7=652$

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Example Question #45 : Mean

Britney is shopping for shorts. What is the average price of the shorts Britney is considering buying if their prices are $7.99, $10.99, $12.99 and $9.99?

Possible Answers:

$\$41.96$ $\displaystyle \$41.96$

$\$10.99$ $\displaystyle \$10.99$

$\$12.99$ $\displaystyle \$12.99$

$\$11.01$ $\displaystyle \$11.01$

$\$10.49$ $\displaystyle \$10.49$

Correct answer:

$\$10.49$ $\displaystyle \$10.49$

Explanation:

First, add the the prices of the shorts:

$\displaystyle 7.99+10.99+12.99+9.99=41.96$

Then, divide that amount by the total number of shorts:

$41.96\div 4=10.49$ $\displaystyle 41.96\div 4=10.49$

The answer is $\$ 10.49$ $\displaystyle \$ 10.49$.

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Example Question #604 : Isee Middle Level (Grades 7 8) Mathematics Achievement

It rained 2 inches on Saturday, 4 inches on Sunday, 3, inches on Monday, and 3 inches on Tuesday. On average, how many inches did it rain each day?

Possible Answers:

$\displaystyle 4$

$\displaystyle 3$

$\displaystyle 9$

$\displaystyle 12$

$\displaystyle 6$

Correct answer:

$\displaystyle 3$

Explanation:

Find the total inches of rain first:

$\displaystyle 2+4+3+3=12$

Then, divide by the number of days:

$12\div 4=3$ $\displaystyle 12\div 4=3$.

Therefore, on average, it rained 3 inches a day.

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Example Question #48 : Mean

Find the mean in this set of numbers:

$\displaystyle 58, 61, 57, 56, 63$

Possible Answers:

$\displaystyle 62$

$\displaystyle 59$

$\displaystyle 57$

$\displaystyle 56$

$\displaystyle 58$

Correct answer:

$\displaystyle 59$

Explanation:

First add all the numbers in the set:

$\displaystyle 58+ 61+ 57+ 56+ 63=295$

Then, divide by the number of terms in the set:

$295\div 5=59$ $\displaystyle 295\div 5=59$

Answer: The mean is $\displaystyle 59$.

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Example Question #47 : Mean

Find the average in this set of numbers:

$\displaystyle 43, 48, 41, 45, 43$

Possible Answers:

$\displaystyle 44$

$\displaystyle 41$

$\displaystyle 45$

$\displaystyle 43$

Correct answer:

$\displaystyle 44$

Explanation:

First, add all the numbers in the set:

$\displaystyle 43+48+41+45+43=220$

Them, divide by the amount of numbers in the set:

$220\div 5=44$ $\displaystyle 220\div 5=44$

Answer: The average is $\displaystyle 44$

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All ISEE Middle Level Math Resources

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

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ISEE Middle Level Math : ISEE Middle Level (grades 7-8) Mathematics Achievement

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

All ISEE Middle Level Math Resources

Example Questions

Example Question #37 : Mean

Example Question #601 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Example Question #41 : Mean

Example Question #601 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Example Question #602 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Example Question #603 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Example Question #45 : Mean

Example Question #604 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Example Question #48 : Mean

Example Question #47 : Mean

All ISEE Middle Level Math Resources

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