Problems on Numbers test
Problems on Numbers – General Questions After learning with solutions you can practice problem on number aptitude question and answers. You can read Number System Questions
Problems on Numbers Formula
(a + b)(a – b) = (a2 – b2)
(a + b)2 = (a2 + b2 + 2ab)
(a – b)2 = (a2 + b2 – 2ab)
(a + b + c)2 = a2 + b2 + c2 + 2(ab + bc + ca)
(a3 + b3) = (a + b)(a2 – ab + b2)
(a3 – b3) = (a – b)(a2 + ab + b2)
(a3 + b3 + c3 – 3abc) = (a + b + c)(a2 + b2 + c2 – ab – bc – ac)
When a + b + c = 0, then a3 + b3 + c3 = 3abc.