$12 \div (3 - 1) = 6$  $6 \times (6 - 1) = 30$ 
Eddie spends $12$ minutes to climb from the first floor to the third floor at a constant speed. At this speed, how many minutes does Eddie need to climb from the first floor to the sixth floor? 
(1) $$24$$ 
(2) $$30$$ 
(3) $$36$$ 
(4) $$42$$ 
(5) $$48$$ 