Aptitude - Square Root and Cube Root - Discussion
Discussion Forum : Square Root and Cube Root - General Questions (Q.No. 4)
4.
1.5625 = ?
Answer: Option
Explanation:
1|1.5625( 1.25
|1
|-------
22| 56
| 44
|-------
245| 1225
| 1225
|-------
| X
|-------
1.5625 = 1.25.
Discussion:
62 comments Page 2 of 7.
Abhay said:
1 decade ago
Sakshi...U r the Best!!
Awesome...
Thnks
Too...good
Awesome...
Thnks
Too...good
Rakshit said:
1 decade ago
@Sakshi is this method works for all numbers that has the last digit as 5 ?
Anila said:
1 decade ago
((5^6)1/2)/((10^4)1/2)=5^3/10^2=5*5*5/10^2=125/10^2=125*10^-2=1.25
Arun.g said:
1 decade ago
I'm not understand the answer 1.25 according to me we divided 1.5625 the answers are 1, 22, 245 how 1.25 comes.
B.sridhar said:
1 decade ago
Shalini explanation is good but the number is different that is 17079 how to calculate please tell me.
Kiran said:
1 decade ago
Varun explaination is very good.
Murali said:
1 decade ago
root of 1.5625 = ?
We can write it as 15625/10000.
=1.5625
= root of 1.5625 = 1.25
We can write it as 15625/10000.
=1.5625
= root of 1.5625 = 1.25
PAYAL HADKE said:
1 decade ago
VERY APT ANSWER MURLI
Ranjeet said:
1 decade ago
How instantly get 5 power of 6 = 15625 as explained by Varun initially, is there as short formula please explain any one ?
Sandhya said:
1 decade ago
sqrt of 1. 5625 = sqrt of [15625/10000].
15625=125*125 ; 10000=100*100.
=125^2 ; =100^2.
sqrt of 15625=[125^2]^ (1/2) ; sqrt of 10000=[100^2]^ (1/2).
Powers get cancelled, therefore = 125/100.
= 1. 25.
15625=125*125 ; 10000=100*100.
=125^2 ; =100^2.
sqrt of 15625=[125^2]^ (1/2) ; sqrt of 10000=[100^2]^ (1/2).
Powers get cancelled, therefore = 125/100.
= 1. 25.
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