ISEE Mathematics Achievement Question 276: Answer and Explanation

Home > ISEE Test > ISEE Mathematics Achievement Practice Tests

Test Information

Use your browser's back button to return to your test results.
Do more ISEE Mathematics Achievement Practice Tests.

Question: 276

6. If the area of a square is 64p², what is the length of one side of the square?

A. 64p²
B. 8p²
C. 64p
D. 8p

Correct Answer: D

Explanation:

D Use the formula for the area of a square: A = s². If A = 64p², then to find the side length of the square, take the square root: = 8. Eliminate (A) and (C) since both choices have 64. For the square root of p², you can plug in for p. Pick an easy number like 2. If p = 2, then p² = 4. So = = 2, which means your answer should equal 2 when you plug in for p. Choice (B) has p², which would be 4, so eliminate (B). Choice (D) has p, which is 2. This matches, so the correct answer is (D).

Previous Next