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 4 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.
Ashish Thakor said:
4 years ago
Thank you everyone for giving the best explanations.
(7)
Timothy Mayanja said:
2 years ago
Thank you everyone for explaining the answer.
(9)
Rohini said:
7 years ago
Thank you all for explaining the solution.
Venkat Reddy Mula said:
7 years ago
@Aruna.
Your method is perfect, Thanks.
Your method is perfect, Thanks.
Sagar said:
6 years ago
@Aruna.
Easy, thanks for solving it.
Easy, thanks for solving it.
(2)
Abi said:
1 decade ago
Hai tamil, your explanation is nice.
Kabita said:
8 years ago
@Sindu.
Please tell me How 3 came?
Please tell me How 3 came?
Esai said:
9 years ago
Explain me about digit sum method.
Deepmars said:
6 years ago
Good explanation, thanks @Pramod.
(2)
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