write P on the blank if the number is prime and C if composite. || 1.63 2.49 3.37 4.13 || identify the factors of each number. 1.25 2.81 3.64 4.36 ||| write each number as a product of its prime factors using the factor tree. 1.28 2.24 3.27 4.35 |V find the common factor of the given pair number. 1.16-24 2.20-30 3.48-56 4.12-18