Prime factorisation of 84:
A. 2 × 2 × 3 × 2 × 7
B. 7 × 2 × 3 × 3
C. 2 × 3 × 7 × 2
D. 3 × 2 × 3 × 2 × 7.
Answer:C
Prime factorisation of 84:
A. 2 × 2 × 3 × 2 × 7 B. 7 × 2 × 3 × 3 C. 2 × 3 × 7 × 2 D. 3 × 2 × 3 × 2 × 7.