Online Test — Exponents & Powers
10 Questions • 20 min • Chapter MCQ
20:00
Question 1 of 10
easy
Write 9 x 9 x 9 x 9 x 9 using exponents.
9^4
9^5
9^6
5^9
Explanation: Five 9's multiplied together = 9^5
Question 2 of 10
easy
Evaluate 2^5.
10
16
25
32
Explanation: 2 x 2 x 2 x 2 x 2 = 32
Question 3 of 10
medium
What is (-3)^4?
-81
-12
12
81
Explanation: Even exponent makes it positive: (-3)x(-3)x(-3)x(-3)=81
Question 4 of 10
medium
Simplify: 5^3 x 5^2
5^5
5^6
25^5
25^6
Explanation: Add exponents when bases are the same: 5^(3+2) = 5^5
Question 5 of 10
easy
Evaluate: 10^0
0
1
10
Undefined
Explanation: Any nonzero number to the power 0 equals 1.
Question 6 of 10
medium
Evaluate: 2 + 3^2 x 4
20
38
44
100
Explanation: Exponents first: 3^2=9. Multiply: 9x4=36. Add: 2+36=38.
Question 7 of 10
medium
(-2)^5 = ?
-32
-10
10
32
Explanation: Odd exponent on negative base gives negative: (-2)^5 = -32
Question 8 of 10
medium
Which is larger: 2^4 or 4^2?
2^4
4^2
Equal
Cannot compare
Explanation: 2^4=16 and 4^2=16, so they are equal.
Question 9 of 10
medium
Simplify: (3^2)^3
3^5
3^6
9^3
27^3
Explanation: Multiply exponents: (3^2)^3 = 3^(2x3) = 3^6
Question 10 of 10
easy
Evaluate: (-1)^100
-100
-1
0
1
Explanation: Even exponent (100) on a negative base gives positive result: (-1)^100 = 1