Aptitude - Square Root and Cube Root - Discussion
Discussion Forum : Square Root and Cube Root - General Questions (Q.No. 5)
5.
If 35 + 125 = 17.88, then what will be the value of 80 + 65 ?
Answer: Option
Explanation:
35 + 125 = 17.88
35 + 25 x 5 = 17.88
35 + 55 = 17.88
85 = 17.88
5 = 2.235
80 + 65 = 16 x 5 + 65
= 45 + 65
= 105 = (10 x 2.235) = 22.35
Discussion:
25 comments Page 2 of 3.
Gargi sarma said:
9 years ago
I don't understand this sum clearly. Can anyone help me to understand this?
Taj said:
9 years ago
How to calculates R5 in short cut method?
Sukanto karmakar said:
10 years ago
I want to know how to calculate value of R5 manually?
Abhijit said:
10 years ago
How to calculate value of R5 manually?
NANALAL said:
10 years ago
Sir How to solve these questions?
R5456*R2120/R460.
R5456*R2120/R460.
Mozzima said:
1 decade ago
How you can eliminate 8 in 8r5?
Vikas said:
1 decade ago
Can anyone explain me the third step of explanation?
Khushb said:
1 decade ago
How is 17.88 turn into 2.235 what 8 did here?
Amit said:
1 decade ago
For better result you can consider it as follow:
The square root of 81 = 9*9 = 9.
So, the square root of 80 should be less then 9 lets guess it as 8.80.
Same way the square root of 4 = 2*2.
We can guest square root of 5 should be greater then 2 lets say it is 2.25.
Now 8.80+6*2.25 = 8.80+13.50 = 22.30.
Choose the nearest answer from our answer which is 22.35.
So answer = 22.35.
This is not accurate method this can be only use when you have very less time.
The square root of 81 = 9*9 = 9.
So, the square root of 80 should be less then 9 lets guess it as 8.80.
Same way the square root of 4 = 2*2.
We can guest square root of 5 should be greater then 2 lets say it is 2.25.
Now 8.80+6*2.25 = 8.80+13.50 = 22.30.
Choose the nearest answer from our answer which is 22.35.
So answer = 22.35.
This is not accurate method this can be only use when you have very less time.
(1)
Manoj Kumar said:
1 decade ago
I am not understanding what you have solved explain it again briefly?
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