(1) What is the sum of any two a) Odd numbers? b) Even numbers?
a) Sum of any two odd numbers is always an even number.
Example:
1 + 3 = 4,
3 + 5 = 8,
5 + 7 = 12
All final obtained numbers (4, 8 and 12) are even numbers.
b) Sum of any two even numbers is always an even number.
Example :
2 + 8 = 10,
12 + 18 = 30,
16 + 20 = 36
All final obtained numbers (10, 30 and 36) are even numbers
Try to remember above statements as it will help to solve questions asked in Maths Olympiad, IIT Exams etc