Standard Form and Expanded Forms

Q. $(3\times {10}^2)+(2\times {10}^1)+(9\times {10}^0)$ expressed in numeral form is .

1. 329
2. 32.9
3. 3290
4. 3.29

Q. Sort the given numbers in ascending order (Highest number comes at the top).

1. 22
2. 31
3. 121
4. 17−1
5. −53

Q. 4009 written in the expanded form is

1. 4×103 + 9×101
2. 4×102 + 9×100
3. 4×103 + 9×100

Q. Speed of a jet is 130000 m/s. In the standard form, we write it as $1.3\times {10}^a$ m/s. The value of a is .

1. 4
2. 5
3. 6
4. -6

Q. If 0.00000000837 is expressed as $x.37\times {10}^y,$ then $y\times {10}^x$ written as a numeral is

1. $8\times {10}^9$
2. $-9\times {10}^8$
3. $-8\times {10}^9$
4. $9\times {10}^8$

Q. $0.0000837=8.37\times$ .

1. ${10}^4$
2. ${10}^5$
3. ${10}^{-4}$
4. ${10}^{-5}$

Q. The value of $2^8$ is .

1. 128
2. 256
3. 512
4. 64

Q.

$(9\times {10}^{-2})+(9\times {10}^3)$ in usual form is

1. $9000.09$

2. $900.9$
3. $9000.9$
4. $900.09$

Q. Superman can fly at speeds almost equal to $2.6\times {10}^7$ m/s. A supersonic jet on the planet Krypton can fly at a maximum speed of 130000 m/s. Choose the correct option(s):

1. The jet flies 200 times faster than Superman
2. Superman flies 2000 times faster than the jet
3. Superman flies 200 times faster than the jet
4. The jet flies 2000 times faster than Superman

Q.

4329 = ___

1. $(4\times {10}^{-3})+(3\times {10}^1)+(2\times {10}^2)+(9\times {10}^3)$

2. $(9\times {10}^0)+(2\times {10}^1)+(3\times {10}^2)+(4\times {10}^3)$

3. $(4\times {10}^{-3})+(3\times {10}^{-2})+(2\times {10}^{-1})+(9\times {10}^0)$

4. $(9\times {10}^{-3})+(2\times {10}^{-2})+(3\times {10}^{-1})+(4\times {10}^3)$