Aptitude - Decimal Fraction - Discussion
Discussion Forum : Decimal Fraction - General Questions (Q.No. 1)
1.
| Evaluate : | (2.39)2 - (1.61)2 |
| 2.39 - 1.61 |
Answer: Option
Explanation:
| Given Expression = | a2 - b2 | = | (a + b)(a - b) | = (a + b) = (2.39 + 1.61) = 4. |
| a - b | (a - b) |
Discussion:
21 comments Page 1 of 3.
Ishita said:
1 year ago
(2.39)²–(1.61)² so it is in the form of a²–b² so it will be( a+b)(a-b) so it will be (2.39+1.61)(2.39-1.61) so by solving we get
2.39 +1.61 =4.00 and 2.39-1.61= 0.78.
Now as in down i.e denomination also 2.39-1.61 is given which is 0.78.
So, we can cut the numerator and denominator i.e
(4.00×0.78)/0.78 = 4 if we cut the numerator 0.78 and denominator 0.78.
So here comes the answer. 4.
2.39 +1.61 =4.00 and 2.39-1.61= 0.78.
Now as in down i.e denomination also 2.39-1.61 is given which is 0.78.
So, we can cut the numerator and denominator i.e
(4.00×0.78)/0.78 = 4 if we cut the numerator 0.78 and denominator 0.78.
So here comes the answer. 4.
(13)
Chakra said:
2 years ago
Here (A+B) (A-B) / (A-B).
Here (A-B) from the numerator and denominator are canceled then (A+B) is the remainder.
So (2. 39+1. 61) =4.
Here (A-B) from the numerator and denominator are canceled then (A+B) is the remainder.
So (2. 39+1. 61) =4.
(7)
Rucha said:
3 years ago
I can't understand this. Anyone, please help me to get it.
(9)
V.Gowsigan said:
3 years ago
Super, thanks for explaining.
(4)
Rohit said:
4 years ago
Why we cannot use separation of denominators? Explain, please.
(1)
Haardhik said:
5 years ago
I can't understand please explain.
(2)
Mr.soumya dhwaj said:
6 years ago
See what we have to do is,
(a+b)x(a-b)/(a-b).
(2.39+1.61)x(2.39-1.61) divided by/(2.39-1.61).
Solving them by opening the brackets we get,
4x0.78/0.78.
Now by solving it we get a figure =3.12 divided by/0.78.
Finally, we get = 4 as our answer.
(a+b)x(a-b)/(a-b).
(2.39+1.61)x(2.39-1.61) divided by/(2.39-1.61).
Solving them by opening the brackets we get,
4x0.78/0.78.
Now by solving it we get a figure =3.12 divided by/0.78.
Finally, we get = 4 as our answer.
(4)
Kato ballack godfrey said:
7 years ago
Explain how?
(1)
Lalita said:
7 years ago
Please explain it again.
Rajeswari said:
7 years ago
Not getting this, please explain clearly.
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