ISEE Middle Level Quantitative : Numbers and Operations

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

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Example Questions

Example Question #18 : How To Find Percentage

What is 5 more than 20% of 20?

Possible Answers:

Correct answer:

Explanation:

The question asks you to find 5 more than 20% of 20. In other words, what is 20% of 20 plus 5.

First, multiply 20 times 20%. To do this, divide 20% by 100:

Multiply your result times 20:

4 is 20% of 20.

Add 5 to this number.

Example Question #61 : Percentage

What percentage of 12 is 3?

Possible Answers:

Correct answer:

Explanation:

We can start to solve by setting up a proportion:

 

In order to figure out what percentage a smaller makes up of a larger value, divide the smaller number by the larger one. So, divide 3 by 12.

Multiply the result of this operation by 100. The new result will be your percentage.

Example Question #21 : How To Find Percentage

On a farm, there are 12 pigs, 10 cows, and 8 horses. What percent of the animals are pigs?

Possible Answers:

 

Correct answer:

Explanation:

In order to figure out what percentage a number is of a larger amount, divide the smaller number by the larger one.

Since there are 12 pigs, divide 12 by 30, the total.

When you multiply the decimal by 100, you are left with your percent.

Example Question #941 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

Star

Refer to the above figure. The star is divided into triangles of equal area. Which is the greater quantity?

(a) The percent of the figure that is shaded.

(b) 67%

Possible Answers:

(a) and (b) are equal

(a) is the greater quantity

It is impossible to determine which quantity is the greater from the information given

(b) is the greater quantity

Correct answer:

(b) is the greater quantity

Explanation:

The star is divided into twelve triangles of equal measure, eight of which are shaded. This is

This is less than 67%, so (b) is the greater,

Example Question #283 : Numbers And Operations

 is a positive number. Which is the greater quantity?

(a) 25% of one third of 

(b) 33% of one fourth of 

Possible Answers:

(b) is the greater quantity

(a) and (b) are equal

(a) is the greater quantity

It is impossible to determine which is greater from the information given

Correct answer:

(a) is the greater quantity

Explanation:

25% of a number is the same as that number multiplied by , so  25% of one third of  is equal to .

Similarly, 33% of a number is the same as that number multiplied by , so 33% of one fourth of  is equal to 

 

We can compare these quantities by finding a common denominator. , so

 

and 

.

25% of one third of  is the greater quantity.

Example Question #942 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

Assorted 1

Examine the above shapes. Which is the greater quantity?

(a) The percent of the shapes that are squares

(b) 50%

Possible Answers:

It is impossible to determine which is greater from the information given

(b) is the greater quantity

(a) and (b) are equal

(a) is the greater quantity

Correct answer:

(a) and (b) are equal

Explanation:

There are twelve shapes; 50% of them is  shapes.

Of the twelve shapes, six are squares - therefore, the percent of the figures that are squares is 50%, and the quantities are equal.

Example Question #285 : Numbers And Operations

 is equal to one eighth of  and 12% of . All variables stand for nonnegative quantities. Which is the greater quantity?

(a) 

(b) 

Possible Answers:

It is impossible to determine which is greater from the information given

(b) is the greater quantity

(a) and (b) are equal

(a) is the greater quantity

Correct answer:

(b) is the greater quantity

Explanation:

 is equal to one eighth of , so

 

 is equal to 12% of , so

, and

 

, and . , so, for positive , it follows that , and .

Example Question #24 : How To Find Percentage

 is a positive number. Which is the greater quantity?

(a) 33% of 

(b) 17% of 

Possible Answers:

(a) is the greater quantity

(a) and (b) are equal

It is impossible to determine which is greater from the information given

(b) is the greater quantity

Correct answer:

(b) is the greater quantity

Explanation:

33% of a number is the same as multiplying it by its fractional equivalent, , so 33% of  is 

Similarly, 17% of  is .

Since  and 

,

and

.

 17% of  is the greater quantity.

Example Question #943 : Isee Middle Level (Grades 7 8) Quantitative Reasoning

 is a positive number. Which is the greater quantity?

(a) 10% of 

(b) 8% of 

Possible Answers:

(b) is the greater quantity

It is impossible to determine which is greater from the information given

(a) and (b) are equal

(a) is the greater quantity

Correct answer:

(a) and (b) are equal

Explanation:

10% of a number is equivalent to that number multiplied by 0.10, so

10% of  is equal to .

8% of a number is equivalent to that number multiplied by 0.08, so

8% of  is equal to .

The quantities are equal.

Example Question #26 : How To Find Percentage

 is  of , which is 10,000 % of .

Which is a true statement?

Possible Answers:

Correct answer:

Explanation:

 is 10,000 % of , so .

 

 is , or , of , so .

Therefore, 

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