Determination of Significant Digits in a Number

Q. How many digits are required to write the numbers from 1 to 100

Q.

The number of significant figures in $0.06900$ is,

1. $5$

2. $4$

3. $2$

4. $3$

Q.

What will be the sum of the digits of the difference between the greatest five digit even number and the smallest four digit odd number?

Q.

You have $10$ gallons of lemonade to sell. $(1\mathrm{gal}\approx 3785{\mathrm{cm}}^3)$

Each customers uses $1$paper cup.

The cups are sold in packages of $50$.

How man packages should you buy?

Q.

What is the square root of $106$?

Q.

Significant figures depend on _________ number of significant figures in the given data.

Q.

Find the volume of the sphere. Round your answer to the nearest tenth.

Q.

Write appropriate unit for the following:

• Thickness of a button

Q.

The surface area of a cube is $294c{m}^2$. Find :

(i) the length of an edge
(ii) volume of the cube.

Q. The sum of the digits of a five digit positive integer is 2. What is the number of such integer?

Q. Express
as rupees using decimals:

Q.

A recipe calls for $3$ cups water. In the metric system, how much water is this?

Q.

While measuring the diameter of a sphere with a Vernier caliper, the $M.S.R$ and $V.C.D$ were found to be $30$ and $3$ divisions, respectively. What is the radius of the sphere, if the number of Vernier scale divisions is $10$, and on the main scale, $1cm$ is divided into $10$ divisions ?

1. $1.515cm$

2. $1.565cm$

3. $1.515mm$

4. $1.555cm$

Q. The graph below shows the relation between the number of minutes and the price charged by the cell phone service provider. Which of the following coordinates are needed to find the unit rate?

1. (3, 0.9), (6, 1.8)
2. (0.9, 3), (1.8, 6)
3. (5, 1.2), (6, 1.5)
4. (8, 2.4), (4, 1.2)

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.

Expresss $18mm$ as centimetre $\left(cm\right)$ using decimals.

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.

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. $23\times 51=?$. Evaluate using Urdhav Triyak :

1. 1163
2. 1173
3. 1263
4. 1273

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.

Expresss $198mm$ as centimetre $\left(cm\right)$ using decimals.

Q.

In a grocery store, Bharat bought a tin of biscuits for Rs. 22.29 and a box of sweets for Rs. 17.6. How much did Bharat pay?

1. Rs. 38.99

2. Rs. 39.98

3. Rs. 39.99

4. Rs. 39.89

Q. $\frac{1}{7}$ of $49$ litre $=$ ____litre

1. $7$
2. $5$
3. $1$
4. $6$

Q. How many significant figures are there in 100??

Q. If the recommended temperature range for a room is greater than ${\frac{35}{3}}^{o}C$ and lesser than ${\frac{205}{9}}^{o}C$, then convert it into fahrenheit scale.
where, x represents the temperature inside the room.

1. ${21}^{o}F$ ≤ x ≤ ${71}^{o}F$
2. ${53}^{o}F$ ≤ x ≤ ${73}^{o}F$
3. ${53}^{o}F$ ≤ x ≤ ${77}^{o}F$
4. ${35}^{o}F$ ≤ x ≤ ${73}^{o}F$

Q. $83\times 87=?$

1. 7331
2. 7221
3. 7321
4. 7231

Q.

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

1. 4

2. 6

3. 1

4. 5

Q.

Compare the following and write the appropriate symbol .$(>,<)$ $102456\_\_\_\_\_103567$$?$

Q.

Find the sum of $3.450,1.250$

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