Power of 10 - class-VIII

Question 1 Multiple Choice (Single Answer)

Evaluate the product of $2.3\times 10^4$ and $3\times 10^3$.

$6.9\times 10^4$
$6.9\times 10^7$
$6.9\times 10^8$
$6.9\times 10^6$

Question 2 Multiple Choice (Single Answer)

Evaluate $\dfrac{6.3\times 10^3}{3\times 10^7}$

$2\times 10^{-3}$
$2.1\times 10^{-3}$
$2.1\times 10^{-4}$
$2\times 10^{-5}$

Question 3 Multiple Choice (Single Answer)

The average distance between the Sun and a certain planet is approximately $\displaystyle 2.3\times { 10 }^{ 14 }$ inches. Which of the following is closest to the average distance between the Sun and the planet, in kilometers? (1 kilometer is approximately $\displaystyle 3.9\times { 10 }^{ 4 }$ inches )

$\displaystyle 7.1\times { 10 }^{ 8 }$
$\displaystyle 5.9\times { 10 }^{ 9 }$
$\displaystyle 1.6\times { 10 }^{ 10 }$
$\displaystyle 1.6\times { 10 }^{ 111 }$
$\displaystyle 5.9\times { 10 }^{ 11 }$

Question 4 Multiple Choice (Single Answer)

Simplify: $\dfrac{1.8\times 10^{11}}{2\times 10^4}$

$9\times 10^7$
$0.9\times 10^6$
$0.9\times 10^5$
$9\times 10^6$

Question 5 Multiple Choice (Single Answer)

Express $(3000)^2\times (20)^3$ in scientific notation:

$7.2\times 10^{10}$
$3.6\times 10^{8}$
$6\times 10^9$
$4.8\times 10^{12}$

Question 6 Multiple Choice (Single Answer)

Standard form of $900000000 + 800000 + 50000 + 3000 + 20 + 3$ is

$90,00,85,323$
$9,85,03,023$
$90,08,53,023$
$9,85,323$

Question 7 Multiple Choice (Single Answer)

Which of the following number is in the scientific notation?

$\displaystyle 1.26\times 10^{-5}$ m
$\displaystyle 15.75\times 10^{3}$ km
$\displaystyle 0.18\times 10^{-7}$ km
$\displaystyle 0.0013\times 10^{-8}$ km

Question 8 Multiple Choice (Single Answer)

Standard form of
$900000000+3000+7$ is

$90003007$
$900003007$
$900003000$
none

Question 9 Multiple Choice (Single Answer)

The population of India is close to $1.08 \times 10^{9}$. Which of the following represents this population written in standard notation?

1,080,000,000
1,080,000
180,000,000
108,000

Question 10 Multiple Choice (Single Answer)

The airports in the United States serve more than 635,000,000 people each year. Which of the following is the same number written in scientific notation?

$635 \times 10^6$
$6.35 \times 10^8$
$6.35 \times 10^{-8}$
$6.35 \times 10^9$

Question 11 Multiple Choice (Single Answer)

Numeral for sixty million and sixty six is

60,000,060
60,000,066
6,000,066
none of these

Question 12 Multiple Choice (Single Answer)

Commas are inserted in a number after each

place
digit
period
none of these

Question 13 Multiple Choice (Single Answer)

9849475825 is written with commas as (International System)

9,84,94,75,825
9,849,475,825
9849,475,82,5
9,8,4,9,4,7,5,8,2,5

Question 14 Multiple Choice (Single Answer)

Places in ones period are

ones and tens
ones, tens and hundreds
tens and hundreds
ones, hundreds and thousands

Question 15 Multiple Choice (Single Answer)

$10$ crore= ....... million

10
100
1
1000

Question 16 Multiple Choice (Single Answer)

How many symbols are used in Roman numerals ?

7
6
9
12

Question 17 Multiple Choice (Multiple Answers)

Which of the following are NOT correctly matched?

I = 7
X = 10
V = 2
XII = 12

Question 18 Multiple Choice (Single Answer)

A number which is a factor of every number is

0
1
2
none of these

Question 19 Multiple Choice (Single Answer)

Which option has same value as $10+10^3$

$2.0\times 10^3$
$8.0\times 10^3$
$4.0\times 10^1$
$1.01\times 10^3$

Question 20 Multiple Choice (Single Answer)

Write $1000000+200000+70000$ in scientific notation.

$1.27\times 10^5$
$1.27\times 10^6$
$3.7\times 10^6$
$1.9\times 10^5$

Question 21 Multiple Choice (Single Answer)

Write $4.5\times 10^5$ in decimal form

$450000$
$45000$
$4500$
$4500000$

Question 22 Multiple Choice (Single Answer)

Express $0.008712$ in scientific notation.

$8.712\times 10^3$
$8.712\times 10^{-3}$
$8.712\times 10^{-4}$
$8.712\times 10^{-2}$

Question 23 Multiple Choice (Single Answer)

Write $50000+4000+20+9$ in standard form.

$54290$
$5429$
$54209$
$54029$

Question 24 Multiple Choice (Single Answer)

Write $8.73\times 10^7$ in standard form.

$8730000$
$873000$
$87300000$
$83700000$

Question 25 Multiple Choice (Single Answer)

Write the following in scientific notation: $(200)^3$

$4\times 10^4$
$8\times 10^6$
$6\times 10^6$
$8\times 10^8$

Question 26 Multiple Choice (Single Answer)

Write in scientific notation: $(400000)^4$

$6.4\times 10^{20}$
$2.56\times 10^{20}$
$2.56\times 10^{22}$
$6.4\times 10^{19}$

Question 27 Multiple Choice (Single Answer)

The scientific notation of $923.4$ is

$9.234\times { 10 }^{ -2 }$
$9.234\times { 10 }^{ 2 }$
$9.234\times { 10 }^{ 3 }$
$9.234\times { 10 }^{ -3 }$

Question 28 Multiple Choice (Single Answer)

The scientific notation of $0.00036$ is

$3.6\times { 10 }^{ -3 }$
$3.6\times { 10 }^{ 3 }$
$3.6\times { 10 }^{ -4 }$
$3.6\times { 10 }^{ 4 }$

Question 29 Multiple Choice (Single Answer)

The decimal form of $2.57\times { 10 }^{ 3 }$ is

$257$
$2570$
$25700$
$257000$

Question 30 Multiple Choice (Single Answer)

The decimal form of $3.506\times { 10 }^{ -2 }$ is

$0.03506$
$0.003506$
$35.06$
$350.6$

Question 31 Multiple Choice (Single Answer)

State the following statement is True or False
$9.954\times 10^4$ can be written as $9954$

True
False

Question 32 Multiple Choice (Single Answer)

In scientific notation, the numbers to the left and right to the decimal point are known as __________ and ________ respectively.

Coefficient, Mantissa
Mantissa, Coefficient
Standard form, Scientific form
Scientific form, Standard form

Question 33 Multiple Choice (Single Answer)

Express $2.53\times 10^{-4}$ in standard notation

$2.53$
$0.0000253$
$0.00253$
$0.000253$

Question 34 Multiple Choice (Single Answer)

Convert $62000+39000$ to scietific form.

$1.01\times 10^5$
$1.1\times 10^5$
$1.01\times 10^4$
$1.1\times 10^4$

Question 35 Multiple Choice (Single Answer)

Convert $6.634\times 10^{-3}$ in decimal form.

$6634$
$0.006634$
$0.006643$
$0.0006634$

Question 36 Multiple Choice (Single Answer)

Write $1200\times 3200$ in scientific notation.

$384000$
$384\times 10^3$
$3.84\times 10^6$
$3840\times10^2$

Question 37 Multiple Choice (Single Answer)

Which of the following options is INCORRECT?

The number $48693$ rounded off to nearest hundred is $48700$
LXXV is greater than LXXIV
One million is equal to $10$ crore
Place value of a digit $=$(face value of the digit)$\times$ (Value of the place)

Question 38 Multiple Choice (Single Answer)

In scientific notation, $670,000,000 + 700,000,000 =$?

$1.37 \times {10}^{-9}$
$1.37 \times {10}^{7}$
$1.37 \times {10}^{8}$
$1.37 \times {10}^{9}$
$137 \times {10}^{15}$

Question 39 Multiple Choice (Single Answer)

IX + XV + XX = _________.

45
35
44
76

Power of 10 - class-VIII

Questions