Q.1 Write all factors of each of the following numbers. (i) 24 ii) 300 (iii) 225 Q.2 Write first five multiples of each of the following numbers (i) 12 ii) 36 (iii) 18 Q.3 Write all prime numbers between (i) 20 and 40 (ii) 80 and 100 Q.4 Express each of the following numbers as the sum of two odd primes (i) 45 (ii) 39 (iii) 64 Q.5 Express each of the following numbers as the sum of three odd primes (i) 63 (ii) 53 (iii) 15 Q.6 Express each of the following as the sum of twin primes (i) 36 (ii) 84 Q.7 Find prime factorization of each of the following numbers (i) 1331 (ii) 1024 (iii) 148 Q.8 Find the product using distributive property of multiplication over addition or subtraction. a) 289 x 1001 b) 1572 x88 + 1572 x 11 +1572 c) 4765 x 998 d) 1987 x 95 + 1987 x 5 Q.9 Find the product by suitable rearrangement a) 4 x 345 x 16 x 25 x 625 b) 698 x 5 x 20 c) 625 x 279 x 32 x 50 d) 4 x 80 x 125 x 75 Q.10 Q9 Find the sum using associative property a) 545 + ( 346 + 113) b) (67 + 78 )+ 42 Q.11 Find the HCF of the following numbers using prime factorization method (i) 72, 144 and 252 (ii) 60 and 72 (iii) 225, 1125 and5625​