# Standard Form - Form 4

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| By Norainics
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Norainics
Community Contributor
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While in school, mathematics is one of the subjects that is considered the toughest. However, enough practice makes it very simple. Below is a quiz on significant figures which will help in your practice and revision.

• 1.

### The number of significant figures of 324 is

• A.

1

• B.

2

• C.

3

• D.

4

C. 3
Explanation
The number 324 has three significant figures because all the digits in the number are non-zero digits, and there are no trailing zeros.

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• 2.

### The number of significant figures of 30024 is

• A.

3

• B.

4

• C.

5

• D.

6

C. 5
Explanation
The number of significant figures in a number is determined by the digits that are not zero. In the given number, 30024, there are five digits that are not zero (3, 0, 0, 2, and 4), so the number has five significant figures.

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• 3.

### The number of significant figures of 30.24 is

• A.

2

• B.

3

• C.

4

• D.

5

C. 4
Explanation
The number 30.24 has four significant figures because all of the digits in the number are known with certainty and contribute to the precision of the measurement.

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• 4.

### The number of significant figures of 0.00302 is

• A.

3

• B.

4

• C.

5

• D.

6

A. 3
Explanation
The number of significant figures in a number is determined by the digits that are known with certainty plus one estimated digit. In the number 0.00302, the zeros before the 3 are considered leading zeros and are not significant. Therefore, the significant figures in the number are 3, 0, and 2. Hence, the correct answer is 3.

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• 5.

### The number 8000 has n significant figures. State the possible value of n.

• A.

0

• B.

1

• C.

5

• D.

6

B. 1
Explanation
The number 8000 has 1 significant figure because the leading zeros in a number are not considered significant. The only significant digit in this number is 8.

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• 6.

### The number of significant figures of 0.040500 is

• A.

2

• B.

3

• C.

4

• D.

5

D. 5
Explanation
The number of significant figures in a number is determined by the number of digits that are known with certainty plus one estimated digit. In the given number, 0.040500, all the digits after the decimal point are considered significant. Therefore, there are a total of five significant figures in the number.

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• Current Version
• Mar 22, 2023
Quiz Edited by
ProProfs Editorial Team
• Jul 24, 2012
Quiz Created by
Norainics

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