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.
Smile said:
9 years ago
@Thukki.
What is digital sum how we get num 4 above.
What is digital sum how we get num 4 above.
Rinki said:
9 years ago
Easy explanation. Thank you all.
Baskar said:
9 years ago
Can you explain logic @Prashant.
Nagarjuna goud said:
9 years ago
Hi @Sravani.
I did not understand your answer how it came?
I did not understand your answer how it came?
Sindu said:
8 years ago
1397*1397= (1397*1000)+(1397*400)-(1397*3) = 1951609.
Split 1397 as (1000+400-3).
Split 1397 as (1000+400-3).
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