Determination of Significant Digits in a Number

Q.

The weights of Rashmi and Anisha are 79.725 kg and 69.45 kg respectively. What are the number of significant digits in the difference between their weights?

1. 4

2. 5

3. 3

4. 6

Q.

Anisha walks 1.32 km, cycles 5.69 km and then travels 10.28 km by bus. What is the number of significant figures of his entire journey?

1. 4

2. 3

3. 2

4. 5

Q.

What are the number of significant digits in the following expression : 4.05020

1. 4

2. 6

3. 1

4. 5

Q.

The price of the blanket was ₹ 2644.644. Find the number of significant digits in the one -fourth of the price of the blanket ?

1. Rs.1234.66

2. Rs.1122.22

3. Rs.1322.32

4. Rs.1033.25

Q.

How many zeroes are there after the decimal place (before a digit comes) when we convert the following Fraction to decimals : $\frac{3468}{{10}^8}$

1. 4

2. 3

3. 5

4. 6

Q.

Count the number of significant figures in the result of the expression 45 $÷$ 8

1. 3

2. 4

3. 5

4. 6

Q.

Anish walks 2.32 km, cycles 5.69 km and then walks 1.28 km. Find the total distance travelled by Anish.

1. 9.29 cm

2. 9.29 m

3. 9.29 km

4. 29.9 m

Q. Write the number of significant figures for 1.0076.

Q. Round off following number upto four significant figures.

1. $2.008$
2. $2.0082$
3. $2.0083$
4. $2$

Q. The diameter of a wire as measured by screw gauge was found to be $2.620,2.625,2.628and2.626cm$. Calculate mean value of diameter.

1. 2.625 cm
2. 2.62 cm
3. 2.63 cm
4. None of the above