5th scholorship math1 CH7 Numbers:Even/Odd, Prime/Composite, Twin Prime/Coprime, Triangular/Square
7) Composite Numbers :- Numbers other than 1whivh are not prime numbers are 'composite numbers.' 8) Twin Prime Numbers :- A pair of prime numbers which different by 2 is called 'Twin prime No'. 9) Coprime No. - Numbers which do not any common divisor other than 1 are called 'Coprime Numbers'.
