Standard Form of Numbers - Class VIII

Question 1 Multiple Choice (Single Answer)

In standard from, the number 829030000 is written as $K\times { 10 }^{ 8 }$ where K is equal to

82903
829.03
82.903
8.2903

Question 2 Multiple Choice (Single Answer)

Charge of an electron is $0.00000000000000000016$ coulomb. This number can also be written in standard form as:

$\displaystyle 1\cdot 6\times 10^{19}$
$\displaystyle 1\cdot 6\times 10^{-20}$
$\displaystyle 1\cdot 6\times 10^{-19}$
$\displaystyle 1\cdot 6\times 10^{18}$

Question 3 Multiple Choice (Single Answer)

Size of a bacteria is $\displaystyle 1.5\times 10^{-7}m$. This number can also be written as:

$0.00000015$
$0.0000015$
$0.000000015$
$15000000$

Question 4 Multiple Choice (Single Answer)

The usual form of $\displaystyle 6\cdot 8793\times 10^{4}$ is:

$687930$
$68793$
$6879.3$
$6879300$

Question 5 Multiple Choice (Single Answer)

Which of the following statement is false?

$\displaystyle 4\cdot 59\times 10^{-3}=0.00459$
$\displaystyle 7\times 10^{-5}=0.00007$
$\displaystyle 1\cdot 03\times 10^{-3}=1030$
$\displaystyle 8\cdot 8\times 10^{-4}=0.00088$

Question 6 Multiple Choice (Single Answer)

Which of the following expressions is true?

$2940000=$$\displaystyle 2\cdot 94\times 10^{5}$
$502000=$$\displaystyle 5\cdot 02\times 10^{5}$
$3683000=$$\displaystyle 3\cdot 683\times 10^{5}$
$40404000=$$\displaystyle 4\cdot 0404\times 10^{5}$

Question 7 Multiple Choice (Single Answer)

When $70, 000$ is written as $7.0\times10^n$, what is the value of $n$?

$1$
$2$
$3$
$4$
$5$

Question 8 Multiple Choice (Single Answer)

The standard form of $15240000$ is __________.

$1.524\times 10^{7}$
$1.524\times 10^{6}$
$15.24\times 10^{7}$
$1.524\times 10^{8}$

Question 9 Multiple Choice (Single Answer)

Which of the following is equivalent to $ 7.7 \times 10^{-6}$?

$0.00000077$
$0.0000077$
$0.000077$
$0.00077$

Question 10 Multiple Choice (Single Answer)

The number $3.02 \times10^{-6}$ can be expressed in decimal form as:

$0.0000302$
$0.00000302$
$0.000302$
$0.00302$

Question 11 Multiple Choice (Single Answer)

The number $3\times10^{-8}$ can also be expressed as:

$0.000003$
$0.00003$
$0.00000003$
$0.0003$

Question 12 Multiple Choice (Single Answer)

The distance of the earth from the sun is 149,000,000 km. In scientific notation the distance is:

$\displaystyle 149\times 10^{6}$ km
$\displaystyle 14.9\times 10^{7}$ km
$\displaystyle 1.49\times 10^{8}$ km
$\displaystyle 0.149\times 10^{9}$ km

Question 13 Multiple Choice (Single Answer)

The standard form of $0.000000000000487$ is ______

$\displaystyle 4\cdot 87\times 10^{-13}$
$\displaystyle 4\cdot 87\times 10^{-14}$
$\displaystyle 4\cdot 87\times 10^{-15}$
$\displaystyle 4\cdot 87\times 10^{-12}$

Question 14 Multiple Choice (Single Answer)

The standard form of $8,60,00,00,00,00,000$ is

$\displaystyle 8\cdot 6\times 10^{13}$
$\displaystyle 8\cdot 6\times 10^{-13}$
$\displaystyle 8\cdot 6\times 10^{12}$
$\displaystyle 8\cdot 6\times 10^{14}$

Question 15 Multiple Choice (Single Answer)

A number is said to be in the standard form when it is written as $\displaystyle k\times 10^{n}$ where $n$ is an integer and:

$\displaystyle 1< k< 10$
$\displaystyle 1< k\leqslant 10$
$\displaystyle 1\leqslant k< 10$
$\displaystyle 1\leqslant k\leqslant 10$

Question 16 Multiple Choice (Single Answer)

The usual form of $\displaystyle 5\times 10^{-8}$ is

$0.000005$
$0.00000005$
$0.0000005$
$0.000000005$

Question 17 Multiple Choice (Single Answer)

The usual form of $\displaystyle 4\cdot 56\times 10^{-5}$ is:

$0.0000456$
$0.00000456$
$0.000456$
$456000$

Question 18 Multiple Choice (Single Answer)

If $0.00044=$$\displaystyle 4\cdot 4\times 10^{n}$ then, find the value of $ n$.

$4$
$5$
$-4$
$-5$

Question 19 Multiple Choice (Single Answer)

Find the value of $n$ such that $502000000=$$\displaystyle 5\cdot 02\times 10^{n}$.

$5$
$7$
$-8$
$8$

Question 20 Multiple Choice (Single Answer)

The standard form of $\displaystyle \frac{1}{10000000}$ is:

$\displaystyle 1\times 10^{-7}$
$\displaystyle 0\cdot 1\times 10^{-7}$
$\displaystyle 1\times 10^{7}$
$\displaystyle 1\times 10^{-6}$

Question 21 Multiple Choice (Single Answer)

The distance of the sun from the earth is $1,49,60,00,00,000$ m. Express it in standard form.

$\displaystyle 1\cdot 496\times 10^{-10}$
$\displaystyle 1\cdot 496\times 10^{-11}$
$\displaystyle 1\cdot 496\times 10^{10}$
$\displaystyle 1\cdot 496\times 10^{11}$

Question 22 Multiple Choice (Single Answer)

The size of a plant cell is $0.00005473$ m. This number can also be written as

$\displaystyle 5\cdot 473\times 10^{-3}$
$\displaystyle 5\cdot 473\times 10^{-5}$
$\displaystyle 5\cdot 473\times 10^{11}$
$\displaystyle 5\cdot 473\times 10^{5}$

Question 23 Multiple Choice (Single Answer)

The usual form of $\displaystyle 2\cdot 73\times 10^{12}$ is:

$273000000000$
$2.730000000000$
$2730000000000$
$27300000000000$

Standard Form of Numbers - Class VIII

Questions