# Exponents, Computation Of Whole Numbers, Probability Of A Simple Event

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| By Lclewis01
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Lclewis01
Community Contributor
Quizzes Created: 1 | Total Attempts: 108
Questions: 9 | Attempts: 108  Settings  This quiz is to review students on evaluating exponents, probability of simple events, and basic computation skills.

• 1.

### Evaluate: 1/2 to the third power

• A.

1/4

• B.

1-6

• C.

1/8

• D.

1/3

C. 1/8
Explanation
To evaluate 1/2 to the third power, we need to multiply 1/2 by itself three times. When we do this, we get (1/2) * (1/2) * (1/2) = 1/8. Therefore, the correct answer is 1/8.

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• 2.

### Evaluate: 5 to the third power.

• A.

15

• B.

125

• C.

625

• D.

8

B. 125
Explanation
To evaluate 5 to the third power, we need to multiply 5 by itself three times. So, 5 to the third power is equal to 5 x 5 x 5, which equals 125.

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• 3.

### Evaluate: (0.5) to the second power.

• A.

0.25

• B.

25

• C.

0.1

• D.

10

A. 0.25
Explanation
To evaluate (0.5) to the second power, we need to multiply 0.5 by itself. When we do this, we get 0.25 as the result.

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• 4.

### +2 + (+5)=

• A.

-8

• B.

+3

• C.

8

• D.

-3

C. 8
Explanation
The given expression is "2 + 5". When we add 2 and 5, the sum is 7. However, there is a positive sign in front of the 5, indicating that it is positive. So, the expression becomes "2 + (+5)" which is equivalent to "2 + 5". Therefore, the answer is 7.

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• 5.

### - 12 + - 5 =

• A.

17

• B.

+17

• C.

- 17

• D.

-7

C. - 17
Explanation
The given expression is a subtraction problem: -12 - 5. When subtracting a negative number, it is equivalent to adding its positive counterpart. So, -12 + (-5) is equal to -17.

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• 6.

### -7 -( -9)

• A.

-16

• B.

-2

• C.

+16

• D.

+2

D. +2
Explanation
When subtracting a negative number, it is equivalent to adding the positive form of that number. In this case, we have -7 - (-9), which can be rewritten as -7 + 9. Adding these two numbers gives us 2, so the correct answer is +2.

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• 7.

### -8 - ( + 7) =

• A.

15

• B.

-15

• C.

-1

• D.

+1

B. -15
Explanation
The given expression is -8 - (+7). The positive sign before 7 indicates that it is a positive number. When we subtract a positive number from a negative number, we add the absolute values and keep the sign of the larger number. In this case, the absolute value of -8 is 8 and the absolute value of +7 is 7. Adding them together gives us 15. Since -8 is the larger number and it is negative, the answer is -15.

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• 8.

### 75-( - 15) =

• A.

60

• B.

80

• C.

90

• D.

-90

C. 90
Explanation
The given expression is 75 - (-15). When subtracting a negative number, it is equivalent to adding the positive of that number. Therefore, -(-15) becomes +15. So, the expression simplifies to 75 + 15, which equals 90.

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• 9.

### Jon had 3 red marbles, 7 black marbles, 9 green marbles, and 6 yellow marble in a bag. Without looking, what is the probability of Jon pulling out a green marble?

• A.

9

• B.

9/16

• C.

9/20

• D.

9/25

D. 9/25
Explanation
The probability of Jon pulling out a green marble can be calculated by dividing the number of green marbles (9) by the total number of marbles in the bag (3 + 7 + 9 + 6 = 25). Therefore, the probability is 9/25.

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