Significant Digits

How many sig figs are found in 2000 miles?

• 1

• 2

• 3

• 4

Answer explanation

The number 2000 has only one significant figure because it is written without a decimal point. Leading zeros are not counted, and trailing zeros in a whole number without a decimal are not significant.

How many significant digits are there in "6605"?

• 1

• 2

• 3

• 4

Answer explanation

The number "6605" has four significant digits. All non-zero digits are significant, and zeros between them are also counted. Therefore, the correct answer is 4.

How many significant digits are there in "0.0805"?

• 2

• 3

• 4

• 5

Answer explanation

In the number 0.0805, the leading zeros are not significant. The significant digits are 8, 0, and 5, totaling 3 significant digits. Therefore, the correct answer is 3.

How many significant digits are there in "0.94"?

• 1

• 2

• 3

• none

Answer explanation

The number "0.94" has two significant digits: the '9' and the '4'. Leading zeros are not counted as significant, so the correct answer is 2.

There are __?__ significant digits in the number 2,000,000

• 1

• 2

• 6

• 7

Answer explanation

The number 2,000,000 has only 1 significant digit, which is the '2'. The trailing zeros are not counted as significant unless specified by a decimal point.

Round "0.265" to two significant digits.

• 0.3

• 0.27

• 0.25

• 0.2

Answer explanation

To round 0.265 to two significant digits, we look at the first two digits (26). The next digit (5) indicates we round up, resulting in 0.27. Thus, the correct answer is 0.27.

How many sig digs are in 0.000300 grams?

• 6

• 3

• 1

• 2

Answer explanation

In 0.000300 grams, the significant digits are the non-zero digits and any zeros between them or after a decimal point. Here, '300' has 3 significant digits: '3', '0', and '0'. Thus, the correct answer is 3.

How many sig digs are in 20.0200

• 2

• 6

• 5

• 4

Answer explanation

The number 20.0200 has six significant digits: 2, 0, 0, 2, 0, and 0. The trailing zeros after the decimal point count as significant, making the correct answer 6.

Which of the following numbers has 3 sig digs?

• 3.33

• 2.0012

• .000123

• .10100

Answer explanation

.000123 has 3 significant digits (1, 2, 3), while 3.33 also has 3 significant digits (3, 3, 3). The leading zeros in .000123 do not count, making it a valid choice. Both .000123 and 3.33 are correct.

How many significant digits are in 23.07 sverdrups?

• 1

• 2

• 3

• 4

Answer explanation

The number 23.07 has four significant digits: '2', '3', '0', and '7'. The zero is significant because it is between non-zero digits, making the correct answer 4.