Aptitude - Square Root and Cube Root - Discussion

Discussion Forum : Square Root and Cube Root - General Questions (Q.No. 4)

Square Root and Cube Root

1.5625 = ?

1.05

1.25

1.45

1.55

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.

Mouni said: 1 week 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.

(1)

Shivaji said: 3 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.

(1)

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.

(59)

Wokete Saeed said: 4 years ago

Thanks for explaining @Dinesh Kumar.

(3)

Sreehari said: 5 years ago

How to get 245?

(1)

Bhavani said: 6 years ago

It's very clear for understanding. Thank you @Swetha.

(1)

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.

(13)

Karthick said: 6 years ago

Thanks for explaining the answer @Varun.

(1)

Honnu said: 6 years ago

@Sidhu.

1+5+6+2+5=19,

How it will be 8?

Please explain.

(1)

Rahul said: 6 years ago

@Sidhu.

How is 1+5+6+2+5=8?

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