Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 22)
22.
| 753 x 753 + 247 x 247 - 753 x 247 | = ? |
| 753 x 753 x 753 + 247 x 247 x 247 |
Answer: Option
Explanation:
| Given Exp. = | (a2 + b2 - ab) | = | 1 | = | 1 | = | 1 |
| (a3 + b3) | (a + b) | (753 + 247) | 1000 |
Discussion:
24 comments Page 2 of 3.
Farzee said:
8 years ago
(a^3+b^3) = (a+b) (a^2-ab+b^2).
1/(a+b) = (a^2-ab+b^2)/(a^3+b^3).
1/(a+b) = (a^2-ab+b^2)/(a^3+b^3).
(2)
Sriaknth said:
1 decade ago
@Pawan .
(a+b) = a3+b3/(a2+b2-ab). We want as reverse so as 1/a+b.
(a+b) = a3+b3/(a2+b2-ab). We want as reverse so as 1/a+b.
Pratiksha sharma said:
1 decade ago
a3 + b3= (a + b) (a2 + b2 - ab)
a2+b2-ab/(a+b)(a2+b2-ab)=1/a+b
a2+b2-ab/(a+b)(a2+b2-ab)=1/a+b
Divi said:
9 years ago
Anyone please derive this equation a^3 + b^3 = a^2 + b^2 - ab.
Sushma said:
9 years ago
Couldn't get it. Explain clearly to understand it.
Jyoti said:
6 years ago
I didn't understand please solve in a simple way.
(4)
Zain said:
6 years ago
I am not getting this, Please anyone explain me.
Arjuna said:
7 years ago
Hi, can anyone explain it in the direct method?
(1)
Thula sunya behuria said:
6 years ago
I am not understanding it. Please explain it.
(2)
Moin said:
1 decade ago
Didn't understand. How you did you solve it?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers