Number Theory Topics

Even Numbers: The numbers that are evenly divided by 2 are called even numbers.

Odd Numbers: The numbers that are not evenly divided by 2 are called odd numbers.

Square Numbers: A number multiplied by itself is called square numbers

Cube Numbers: A number multiplied by itself 3 times is called cube numbers.

Prime numbers: If a number has only two factors: 1 and the number is called prime numbers

Co Prime Numbers: Two numbers are called co prime numbers, if the highest common factor between the two is 1.

Composite Numbers: Composite number has more than two factors. The composite numbers are numbers which are not prime numbers. The number 1 is neither prime nor composite.

Modulo 4 Numbers: A number is said to be 1 (modulo 4 ) number if it leaves a remainder 1 when divided by 4.Similarly, if a number leaves a remainder 3 when divided by 4, it is said to be 3 (modulo 4) number.

Triangular Numbers: A number is said to be a triangular number when that number of pebbles can be arranged in a triangle using one pebble at the top, two pebbles in next row, three pebbles in next row and so on.

Fibonacci Numbers: Fibonacci numbers are created starting with 1 and 1, then get the next number in the list and adds the previous two numbers. Say, 1+1 =2 and then add 1+2 you get 3, then adds 2+3 gives 5, then 3+5 gives 8 and so on.