Graph Theory Discrete Mathematics

Can someone explain-->"Since n(n-1) must be divisible by 4, it follows that n=0 or 1 (mod 4)"?

• Rohan
• 2638 Views
• 0 Answers

• i want to attempt unlimited questions each day for practice. but this app only provides 20 questions each day and that is not enough for me. to attempt as many questions i want what should i do?
• How can I check the score of mock tests?? and get the answers of mock test??
• Which one is the best GATE coaching for computer science and information technology (CS) in Delhi?
• Tips and tricks to crack GATE examination?
• how percentile is calculated in gate
• Best Book for Topicwise Previous Year Solved Papers with Solution?
• Кухни на заказ
• Need more tests to start practice
• I have upgraded my plan but my money is debited from my account but the upgradation is not done
• What do you mean by GATE? Is it an online exam?