Electrical Engineering - Quantities and Units - Discussion

Discussion :: Quantities and Units - General Questions (Q.No.3)

3. 

The number 65,000 expressed in scientific notation as a number between 1 and 10 times a power of ten is

[A]. 0.65 × 104
[B]. 6.5 × 104
[C]. 65 × 104
[D]. 650 × 103

Answer: Option B

Explanation:

No answer description available for this question.

Mahalakshmi said: (Dec 10, 2010)  
65,000 can be written as 65*1000
1000=10^3
65=6.5*10

Therefore 6.5*10^4

Tejaswini said: (Mar 6, 2011)  
Look at the options oprionA: 0.65 is not between 1and 10
option B: 6.5 is the number between 1and 10
so 65000 means 6.5*10^4
and remaining options 65 and 650 also not the numbers between 1 and 10
So ans is optionB

Ragav said: (Oct 1, 2011)  
I agree with both tejaswani & mahalaxmi.

Santosh said: (Oct 30, 2011)  
I agree with mahalaxmi as well as tejaswani.

Ashish Sharma said: (Oct 12, 2013)  
65000 = 65*1000.

65*10^3 = 6.5*10^3+1.

= 6.5*10^4.

Jannat said: (Feb 21, 2014)  
Why we add +1 here? what is the logical reason behind this?

Amit Aryan said: (Mar 6, 2014)  
@Ashish, If u add +1 must divide 10^-1.

Like as 6.5*10^3/10^-1.

Prince Janesh Unique said: (Jul 30, 2014)  
Here, Without Solvation we can choose Answer cuz the question is asked between the number 1 and 10.. so I seen clearly Option {B} as answer

Lets discuss easy manner answer to question.

65,000 = 65*10^3 or
65,000 = 6.5*10^4 is the answer, by decreasing in left side to decimal point, we should add +0 to the right side.

D.Sudhakar said: (Sep 24, 2014)  
What means 65* what is the logic in behind this?

Siva said: (Oct 7, 2014)  
What is mean by ten?

Vasanth said: (Oct 8, 2014)  
But if we do in exponential how can we get this?

Oladokunibrahim said: (Mar 11, 2015)  
Am very interested but I did not understand how 1 was added.

Mostafiz(Eee) said: (Apr 14, 2015)  
If you normally see,

10*3=3000 (10*10*10) and,

10^3 it is calculation same now,

We see 10*10*10*65=65000 ok.

Shailu said: (Aug 8, 2015)  
Definitely considered this answer.

Ajees said: (Aug 14, 2015)  
Please give exact correct explanation simple method.

Rajendiran S said: (Aug 29, 2015)  
1000 = 1*10^3.
5000 = 5*10^3.
65000 = 65*10^3.

= 6.5*10^(3+1).
= 6.5*10^4.

Stephen said: (Sep 11, 2015)  
Am not clear with the answers given, please can you give simple solution to this question?

Mehmood said: (Jan 13, 2016)  
Remember if we change in fraction must add 1.

Raghuwansh said: (Apr 24, 2016)  
Nice.

Thank you all for explaining the problem.

Kailash Meher said: (Sep 11, 2016)  
Thank you to all for explaining the problem in an easy way.

Shivaraj said: (Jan 12, 2017)  
I understand now, Thank you all for explaining the problem.

Saritha said: (May 27, 2017)  
65,000.
65 * 1000 = 65*10^3.
65 * (10/10) * 10^3.
(65/10) * (10^1*10^3).
6.5 * 10^4.
{a^m*a^n=a^(m+n)}.

Chandru said: (Jun 9, 2017)  
Thank you all for the given explanation.

Muzaffar Baba said: (Mar 26, 2018)  
Sol:

65000= 65*1000
= [65*10^3]
= [65/10 * 10 * 10^3] {Multiple & divide 65 by 10}.
= [65/10 * 10 * 10^3 {10^3 3 is raised power 10},
= [65/10 * 10^4] {bases are same powers are added i.e 10^1 * 10^3=10^4},
= [6.5*10^4] {65/10=6.5}.

So, the Answer is (B).

Ifeanyi Solomon said: (May 10, 2018)  
According to me, it should be 65*10^3.

Vishnu Priya said: (Jun 20, 2018)  
I can't understand clearly. Please explain to me.

Avijit Hazra said: (Jul 8, 2018)  
I can't understand. Please explain the solutions.

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