PARCC Exponent 3 — Questions and Answers
Question 1: Simplify: y^10 ÷ y^4
- y^6 (Correct answer)
- y^14
- y^40
- y^2.5
Correct answer: y^6
Dividing like bases subtracts exponents: 10−4=6.
Question 2: Simplify: (3x)^2
- 3x^2
- 6x^2
- 9x^2 (Correct answer)
- 9x
Correct answer: 9x^2
Apply the exponent to both 3 and x: 3^2·x^2 = 9x^2.
Question 3: What is 4^(1/2)?
- 2 (Correct answer)
- 8
- 16
- 1
Correct answer: 2
An exponent of 1/2 means the square root: √4 = 2.
Question 4: Simplify: a^7 · a^(-2)
- a^5 (Correct answer)
- a^9
- a^(-14)
- a^(-5)
Correct answer: a^5
Add the exponents: 7+(−2)=5.
Question 5: What is (1/2)^3?
- 1/6
- 1/8 (Correct answer)
- 3/2
- 1/2
Correct answer: 1/8
Cube both numerator and denominator: 1^3/2^3 = 1/8.
Question 6: Simplify: (x^2 y^3)^2
- x^4 y^6 (Correct answer)
- x^4 y^5
- x^2 y^6
- x^4 y^9
Correct answer: x^4 y^6
Multiply each exponent by 2: x^4 y^6.
Question 7: What is 7^1?
- 1
- 0
- 7 (Correct answer)
- 14
Correct answer: 7
Any number to the first power is itself.
