ISEE Upper Level Quantitative : Exponential Operations

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

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Example Questions

Example Question #122 : Numbers And Operations

Column A                      Column B

                               

 

Possible Answers:

The relationship between the columns cannot be determined.

The quantities in both columns are equal.

The quantity in Column B is greater.

The quantity in Column A is greater.

Correct answer:

The quantity in Column A is greater.

Explanation:

You can simplify Column A first. When you're dividing with exponents and bases are the same, subtract the exponents. Therefore, it simplifies to x. We know that x is positive since it is greater than 1. X is greater than . Try plugging in a number to test. 25 is greater than , which is 5. Even 1.1 is greater than . Therefore, Column A is greater.

Example Question #21 : Exponential Operations

Two quantities are given - one in Column A and the other in Column B. Compare the quantities in the two columns.

Assume, in both columns, that .

Column A                       Column B

                 

Possible Answers:

The quantity in Column B is greater.

The relationship cannot be determined from the info given.

The quantity in Column A is greater.

The quantities in both columns are equal.

Correct answer:

The quantity in Column B is greater.

Explanation:

When you are adding and subtracting terms with exponents, you combine like terms. Since both columns have expressions with the same exponent throughout, you are good to just look at the coefficients. Remember, a coefficient is the number in front of a variable. Therefore, Column A is since . Column B is since . We can see that Column B is greater.

Example Question #22 : Exponential Operations

Add all of the perfect squares between 50 and 100 inclusive.

Possible Answers:

The correct answer is not among the other choices.

Correct answer:

Explanation:

The perfect squares between 50 and 100 inclusive are

Their sum is 

Example Question #23 : Exponential Operations

Which is the greater quantity?

(A) The sum of the first ten perfect square integers

(B) The sum of the first five perfect cube integers

Possible Answers:

(A) is greater

(A) and (B) are equal

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

(B) is greater

Correct answer:

(A) is greater

Explanation:

The sum of the first ten perfect square integers:

The sum of the first five perfect cube integers:

(A) is greater.

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