Aptitude - Decimal Fraction - Discussion
Discussion Forum : Decimal Fraction - General Questions (Q.No. 12)
12.
| 4.2 x 4.2 - 1.9 x 1.9 | is equal to: |
| 2.3 x 6.1 |
Answer: Option
Explanation:
| Given Expression = | (a2 - b2) | = | (a2 - b2) | = 1. |
| (a + b)(a - b) | (a2 - b2) |
Discussion:
14 comments Page 2 of 2.
Murali said:
5 years ago
I have taken approx value of;
4.2 as 5
1.9 as 2
2.3 as 3
and 6.1 as 7.
and I got the answer 1.
4.2 as 5
1.9 as 2
2.3 as 3
and 6.1 as 7.
and I got the answer 1.
(1)
Neeraj Bhaskar said:
5 years ago
How the denominator value is match with the mentioned formula? please explain.
(1)
Aakash gk said:
4 years ago
Neeraj just take the approx value;
For eg;
4.2 as 4,
1.93 as 2,
2.3 as 2,
6. 1 as 6.
You'll 4 * 4 - 2*2 / 2*6.
= 12/12,
= 1.
For eg;
4.2 as 4,
1.93 as 2,
2.3 as 2,
6. 1 as 6.
You'll 4 * 4 - 2*2 / 2*6.
= 12/12,
= 1.
(19)
Bittu Rana said:
2 months ago
(4.2-1.9)(4.2+1.9)/2.3*6.1.
So, the Answer: B 1.0
So, the Answer: B 1.0
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