Useful Maths Number system Shortcuts (For IBPS, SSC, GOVERNMENT EXAMS)
Useful Number system Shortcuts. ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 1. When Sum and Diff of two numbers (X and Y) are given, then X = (sum + diff)/2 Y = (sum – diff)/2 . 2. Diff between two digits of two digit number is =(Diff in original and interchanged number)/9 . 3. Sum of first n odd nos is … Read more