Finding Significant Figures

Q. Find the number of significant figure in 2435.67 using scientific notation.

1. 2
2. 3
3. 4
4. 6

Q.

How many significant figures are there in the product:

$(2.156\times {10}^1)\times (4.567891\times {10}^2)\times (5.1102\times {10}^3)$

1. 3

2. 4

3. 7

4. 10

Q.

Is there a difference between the given measurements:

a) 7

b) 7.0

c) 7.00

1. yes

2. No

Q. Which is more precise?

1. 14
2. 14
3. 14
4. All have same precision

Q. Find the number of significant figures in the given data
$\begin{array}{cc}\text{P)}0.543& \text{U)}3\\ \text{Q)}4.330& \text{V) 4}\\ \text{R)}1.32\times {10}^{-2}& \text{W)}5\\ \text{S)}0.002& \text{X)}1\end{array}$

1. p-v, q-v, r-u, s-u

2. p-v, q-v, r-u, s-v

3. p-u, q-u, r-u, s-u

4. p-u, q-u, r-u, s-x

Q.

Round off the given measurement up to first decimal place 16.35

__

Q.

Illustration: The mass of a box is 2.3 kg. Two marbles of masses 2.15 g and 12.39 g are added to it. Find the total mass of the box to the correct number of significant figures.

1. 2.310 kg

2. 2.31 kg

3. 2.3 kg

4. 2 kg

Q.

Add 3.1421 , 0.241 and 0.09 and give your answer with correct precision

1. 3.4

2. 3.4731

3. 3.47

4. 3.473

Q. Find the number of significant figure in 2435.67 using scientific notation.

1. 6
2. 2
3. 3
4. 4

Q.

Evaluate $\frac{25.2\times 1374}{33.3}$. All the digits in this expression are significant.

1. 1039

2. 1039.784

3. 1040

4. 104