2.Playing with Numbers

Use of Brackets and Simplification of Brackets 21 Factors and Multiples 23 Odd and Even Numbers 23 Test of Divisibility 23 Prime and Composite Numbers 26 Co-prime Numbers 28 Twin Prime Numbers 28 Common Factors and Common Multiples 29 Prime Factorization 29 Highest Common Factor and Lowest Common Multiple (HCF and LCM)