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 1 of 7.
JUBANLAK SUTNGA said:
3 years ago
= 15625/10000,
= 25/16,
= √5^2/4^2,
= 5/4,
= 1.25.
It's the easiest way to find the answer.
= 25/16,
= √5^2/4^2,
= 5/4,
= 1.25.
It's the easiest way to find the answer.
(60)
Swetha said:
6 years ago
Let we know x2 = a.
So, x = √a.
Therefore by referring to all the options with there square;
Let options
A)1.05 * 1.05 = 1.1025
B)1.25 * 1.25 = 1.5625.
So by this, we recognise option B is correct.
So, x = √a.
Therefore by referring to all the options with there square;
Let options
A)1.05 * 1.05 = 1.1025
B)1.25 * 1.25 = 1.5625.
So by this, we recognise option B is correct.
(13)
Wokete Saeed said:
4 years ago
Thanks for explaining @Dinesh Kumar.
(3)
Pranitha said:
7 years ago
(15625/10000) ^1/2.
We have to cancel the above 2values.
Then we get (25/16) ^1/2,
= 5/4.
The ans is 1.25.
We have to cancel the above 2values.
Then we get (25/16) ^1/2,
= 5/4.
The ans is 1.25.
(3)
Shivaji said:
6 months ago
Given (1.5625)^2.
= (15625/10000)^2,
= (5*5*5*5*5*5/10*10*10*10)^2,
= (5^2*5^2*5^2/10^2*10^2)^2,
= 5*5*5/10*10.
= 125/100.
Then the answer is 1.25.
= (15625/10000)^2,
= (5*5*5*5*5*5/10*10*10*10)^2,
= (5^2*5^2*5^2/10^2*10^2)^2,
= 5*5*5/10*10.
= 125/100.
Then the answer is 1.25.
(2)
Mouni said:
3 months ago
√1.5625
Step 1. Check the last digit possibility 5 = 5,
Step 2. Strike off the last three digits.
Step 3. The remaining value is close to the perfect square root i.e 5 is nearly √2=4=2.
√1 = 1
Therefore, the result is = 1.25.
Step 1. Check the last digit possibility 5 = 5,
Step 2. Strike off the last three digits.
Step 3. The remaining value is close to the perfect square root i.e 5 is nearly √2=4=2.
√1 = 1
Therefore, the result is = 1.25.
(1)
Sheetal said:
1 decade ago
Thanks for the simple explanations. Please include shortcut tricks along with the explanations.
(1)
Sidhu said:
8 years ago
@ALL.
Very simple short cut
1+5+6+2+5 = 8
[A]. 1.05(1+5)=6.
[B]. 1.25 (1+2+5)=8.
[C]. 1.45(1+4+5=10)=(1+0)=1.
[D]. 1.55(1+5+5=11)=(1+1)=)2.
So the answer is B.
Very simple short cut
1+5+6+2+5 = 8
[A]. 1.05(1+5)=6.
[B]. 1.25 (1+2+5)=8.
[C]. 1.45(1+4+5=10)=(1+0)=1.
[D]. 1.55(1+5+5=11)=(1+1)=)2.
So the answer is B.
(1)
Rahul said:
7 years ago
@Varun
The 3rd step is;
{(5*5*5*5*5*5)/10*10*10*10)},
= 5*5*5/10*10,
= 125/100,
= 1.25.
The 3rd step is;
{(5*5*5*5*5*5)/10*10*10*10)},
= 5*5*5/10*10,
= 125/100,
= 1.25.
(1)
Honnu said:
6 years ago
@Sidhu.
1+5+6+2+5=19,
How it will be 8?
Please explain.
1+5+6+2+5=19,
How it will be 8?
Please explain.
(1)
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