16. Find the least common multiple of the following arrays: (i) 198,252 ; (ii) 482,1689 .
16. (i) $[198,252]=2[99,126]=18[11,14]=2^{2} \cdot 3^{2} \cdot 7 \cdot 11$, the last step uses part (i) of question 10; (ii) $[482,1687]=241[2,7]=2 \cdot 7 \cdot 241$.