I, J, K, L, Y, and Z live on six different floors of the

Solution

1.    I lives on floor 5.
→ So, I = 5 2.    L lives on a floor above I.
→ So, L can be on floor 6 only (since floor 5 is already taken by I) 3.    Only K lives below Y.
→ This means: o    K is the only person living on a floor lower than Y o    So, Y must be higher than K, and everyone else must be either above Y or between Y and K 4.    Z lives on an even-numbered floor.
→ So Z can be on floor 2 , 4 , or 6
→ But L is already on 6 (from clue 2), so Z can be on 2 or 4 ·    From clue 1 and 2: o   I = 5 , L = 6 ·    Assume K is on floor 1 (lowest possible) ·    Since only K lives below Y, that means Y must be on floor 2 So: K = 1 , Y = 2 ·    That leaves floors 3 and 4 (and Z must be on an even floor).
So Z must be on floor 4
Z = 4 ·    We now only have floor 3 left for J
J = 3 Final arrangemnt: How many people live below J? •  People below J are: Y (floor 2) and K (floor 1) •  So, 2 people live below J