ISEE Middle Level Quantitative : How to find the solution to an equation

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

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Example Questions

Example Question #21 : How To Find The Solution To An Equation

Which is the greater quantity?

(A) 

(B) 

Possible Answers:

(A) and (B) are equal

(A) is greater

(B) is greater

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

Correct answer:

(B) is greater

Explanation:

 

 

, so (B) is greater.

Example Question #22 : How To Find The Solution To An Equation

Which is greater?

(A) 

(B) 

Possible Answers:

(A) and (B) are equal

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

(B) is greater

(A) is greater

Correct answer:

(B) is greater

Explanation:

 

 

, so (B) is the greater quantity.

Example Question #21 : Equations

How many elements of the set  can be substituted for  to make the inequality  a true statement?

Possible Answers:

None

One 

Three 

Two 

Four

Correct answer:

None

Explanation:

 

None of choices fit this criterion, so the correct answer is none.

Example Question #22 : Equations

How many elements of the set  can be substituted for  to make the inequality  a true statement?

Possible Answers:

Two

Five 

Four

None

One

Correct answer:

One

Explanation:

 (Note that the inequality symbol switches here)

 

Of the elements of , only  fits this criterion.

Example Question #25 : How To Find The Solution To An Equation

If , then how many integers can be substituted for  to make the equation  a true statement?

Possible Answers:

Zero

Infinitely many

It cannot be determined from the information given

Two

One 

Correct answer:

One 

Explanation:

If , the equation can be rewritten and solved as follows:

This is the only number that makes this statement true, so the correct choice is "one".

Example Question #26 : How To Find The Solution To An Equation

If , then how many integers can be substituted for  to make the equation  a true statement?

Possible Answers:

Zero

Two

Six

Three

One

Correct answer:

One

Explanation:

If , then the equation can be rewritten and solved as follows:

The only integer that can be cubed to yield the result  is , so the correct response is "one".

 

Example Question #22 : Equations

If , then how many integers can be substituted for  to make the equation  a true statement?

Possible Answers:

It cannot be determined from the information given

Zero

One

Two

Infinitely many

Correct answer:

Two

Explanation:

If , the equation can be restated and solved as follows:

Both  and  make this true, so both make the original statement true. "Two" is the correct choice.

Example Question #21 : Equations

How many elements of the set  can be substituted for  to make the inequality  a true statement?

Possible Answers:

Four

Five

Two

One

Three

Correct answer:

One

Explanation:

Of the elements of the set , only  fits this criterion, making "one" the correct choice.

Example Question #29 : How To Find The Solution To An Equation

Which is the greater quantity?

(A) 

(B) 

Possible Answers:

(A) is greater

(A) and (B) are equal

(B) is greater

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

Correct answer:

(A) is greater

Explanation:

 

 

Since .

, so (A) is greater.

Example Question #23 : Equations

If , then how many integers can be substituted for  to make the equation  a true statement?

Possible Answers:

One

Four

Two

Infinitely many

Zero

Correct answer:

Infinitely many

Explanation:

If , this can be rewritten as

However, since zero multiplied by any number yields a product of zero, this is a true statement for all values of . This makes "infinitely msny" correct.

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