5 x 7 3 x 13 July 8, 2019 16 32 64 128 5 x 7 )= 3 x 4 )- 13 5 (- x 7 )+ 3x =- 13 2 x 5 x 7 x 3 x 13 7 x 3 ) 5x 13 5 2 x 7 3 x 9 2 x 11 13 29 Is 3 x 5 x 7 x 11 x 13 a composite number 3 x 5 x 7 11 x 13 x 17 2 x 3 x 5 x 7 x 11 x 13 2 x 3 )/ 7 x 5 3 13 x 4 21 5 x 7 = 35 3 x-5=x+3 5 x 5 x 5 x 5 x 5