Significant Figures And Rounding Quiz Questions And Answers

Reviewed by Editorial Team

The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.

Learn about Our Editorial Process

| By Joel Dodd

Joel Dodd

Community Contributor

Quizzes Created: 26 | Total Attempts: 204,846

| Attempts: 10,792

Quiz Flashcard

Questions

Feedback

During the Quiz End of Quiz

Difficulty

Sequential Easy First Hard First

Share on Facebook Share on Twitter Share on Whatsapp Share on Pinterest Share on Email Copy to Clipboard Embed on your website

1/10 Questions

How many significant figures are there in the number 37 460 000?
- 1
- 9
- 5
- 4
- 8

About This Quiz

Assesses the student's understanding of significant figures and their skill in rounding large and small numbers, including decimals.

Questions and Answers

2.

The number 45.0380 has ______ significant figures

Explanation
The number 45.0380 has six significant figures because all the digits in the number, including the trailing zero after the decimal point, are considered significant.

Rate this question:

23
3.

How many significant figures are there in the number 0.0000473?
- 3
- 7
- 4
- 8
- 1
Correct Answer

A. 3

Explanation

The number 0.0000473 has three significant figures. The significant figures in a number are the digits that carry meaning in terms of precision. In this case, the digits 4, 7, and 3 are significant because they provide information about the magnitude of the number. The zeros before the 4 are not significant because they only indicate the decimal place and do not add any additional information. Therefore, the correct answer is 3.

Rate this question:

8
4.

The number 3.000400 has how many significant numbers?
- 1
- 7
- 5
- 4
- 1
Correct Answer

A. 7

Explanation

The number 3.000400 has seven significant figures. Significant figures are the digits in a number that carry meaning in terms of precision. In this case, all the non-zero digits (3 and 4) are significant, as well as the zeros between them (000) and the zero at the end after a decimal point. Therefore, there are a total of seven significant figures in the given number.

Rate this question:

12
5.

Round 37465849 to 3 significant figures:

Correct Answer
37500000

Explanation
When rounding a number to 3 significant figures, we start counting from the leftmost non-zero digit. In this case, the leftmost non-zero digit is 3. The next two digits after 3 are 7 and 4. Since 7 is greater than or equal to 5, we round up the 4 to 5. Therefore, the number 37465849 is rounded to 37500000 when rounded to 3 significant figures.

Rate this question:

18
6.

Round 0.0047314 to 2 significant figures:

Correct Answer
0.0047

Explanation
The given number, 0.0047314, has 6 decimal places. To round it to 2 significant figures, we start from the leftmost non-zero digit, which is 4. We keep this digit and the next significant digit, which is 7. Since the next digit, 3, is less than 5, we do not round up. Therefore, the rounded number is 0.0047.

Rate this question:

8
7.

Rounded to 2 significant figures, 299374 is
- 29
- 290000
- 30
- 3
- 300000
Correct Answer

A. 300000

Explanation

Rounding to 2 significant figures means that we need to keep the first two non-zero digits and round the rest of the digits. In this case, the first two non-zero digits are "30" and the rest of the digits are "000". Since the next digit after "30" is "0", we round down. Therefore, rounded to 2 significant figures, 299374 is 300000.

Rate this question:

9
8.

Round 0.99538 to 2 significant figures:

Correct Answer
1.0

Explanation
To round 0.99538 to 2 significant figures, we look at the first two non-zero digits and round the number accordingly.
The first two non-zero digits in 0.99538 are 9 and 9, so we keep these digits and round the following digit (5):
Since 5 is greater than or equal to 5, we round up the last digit to get:
0.99538 rounded to 2 significant figures is 1.0.

Rate this question:

7
9.

2760087 rounded to 3 significant figures is
- 2770000
- 2760000
- 276
- 2800000
- 280
Correct Answer

A. 2760000

Explanation

When rounding to 3 significant figures, we start from the leftmost non-zero digit and count the digits to the right. In this case, the leftmost non-zero digit is 2. We count three digits to the right, which gives us 760. Since the next digit, 8, is greater than or equal to 5, we round up the previous digit, 6, to 7. Therefore, the rounded value is 2760000.

Rate this question:

2
10.

Round 1.820047 to 3 significant figures:

Correct Answer
1.82

Explanation
When rounding a number to 3 significant figures, we start counting from the leftmost non-zero digit. In this case, the leftmost non-zero digit is 1. The next two digits are 8 and 2. Since 8 is greater than or equal to 5, we round up the last digit, which is 2, to the next higher number. Therefore, the rounded number is 1.82.

Rate this question:

6

Quiz Review Timeline (Updated): Feb 7, 2024 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
Feb 07, 2024

Quiz Edited by
ProProfs Editorial Team
Jul 25, 2010

Quiz Created by
Joel Dodd

Significant Figures And Rounding Quiz Questions And Answers

How many significant figures are there in the number 37 460 000?

The number 45.0380 has ______ significant figures

How many significant figures are there in the number 0.0000473?

The number 3.000400 has how many significant numbers?

Round 37465849 to 3 significant figures:

Round 0.0047314 to 2 significant figures:

Rounded to 2 significant figures, 299374 is

Round 0.99538 to 2 significant figures:

2760087 rounded to 3 significant figures is

Round 1.820047 to 3 significant figures: