Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 5)
5.
1397 x 1397 = ?
Answer: Option
Explanation:
| 1397 x 1397 | = (1397)2 |
| = (1400 - 3)2 | |
| = (1400)2 + (3)2 - (2 x 1400 x 3) | |
| = 1960000 + 9 - 8400 | |
| = 1960009 - 8400 | |
| = 1951609. |
Discussion:
55 comments Page 6 of 6.
Ashish Thakor said:
4 years ago
Thank you everyone for giving the best explanations.
(7)
Shivam said:
4 years ago
1397 * 1000 = 1397000,
1397 * 300 = 419100,
1397 * 90 = 125730,
1397 * 7 = 9779.
1397000 + 419100 + 125730 + 9779 = 1951609.
1397 * 300 = 419100,
1397 * 90 = 125730,
1397 * 7 = 9779.
1397000 + 419100 + 125730 + 9779 = 1951609.
(101)
Timothy Mayanja said:
2 years ago
Thank you everyone for explaining the answer.
(9)
ABD said:
4 months ago
1397 = 1 + 3 + 9 + 7 = 20.
1397 = 1 + 3 + 9 + 7 = 20.
20 * 20 = 400 = 4 + 0 + 0 = 4.
From options
A) 1951609 = 1 + 9 + 5 + 1 + 6 + 0 + 9 = 31,
3 + 1 = 4.
4 = 4. Hence ANSWER.
1397 = 1 + 3 + 9 + 7 = 20.
20 * 20 = 400 = 4 + 0 + 0 = 4.
From options
A) 1951609 = 1 + 9 + 5 + 1 + 6 + 0 + 9 = 31,
3 + 1 = 4.
4 = 4. Hence ANSWER.
(34)
Ajay said:
1 month ago
@Pramod.
Very clear and understanding. Thanks for your explanation.
Very clear and understanding. Thanks for your explanation.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers