Solution:

Marshall lives in House no.36
Robin lives in House no.4
Barney lives in House no.9
Lily lives in House no.35
Lyndsy lives in House no.24

Solution:

48 minutes.

Donald duck's speed = X km/seconds
pool current speed = Y km/seconds

2/(X+Y) = 40
2/(X-Y) = 60

Solving the simultaneous equations gives X = 1/24

Therefore, to cover 2km will take 2/X = 48 seconds

Solution:

Megan (9:00AM) - Keira (11:00AM) - Penelope (8:00PM) - Charlize (10:00PM)

From the given data, it is clear that at least one female visited me in the morning and at least one female visited me in the evening. Also, from (4), Penelope did not visit me first. It means that Penelope visited me at 8:00 PM. From (3), Megan must have visited me at 9:00 AM. Also, either Charlize or Keira or both visited me in the morning. But from (2), only Keira must have visited me in the morning at 11:00 AM and hence, Charlize visited me at 10:00 PM.

Solution:

Kingfisher

Solution:

Comfortable (Come 4 Table)

Solution:

The first one cannot be aishwarya, because that would make the first one a liar. The second one cannot be aishwarya for the same reason. So, the third sister must be aishwarya. This means the middle one is kareena and the only one left is katrina.

Solution:

First come, first served

Solution:

4

6*3 equals 18
7*9 equals 63
6*4 equals 24
7*6 equals 42, ? should be replaced by 4.

Solution:

4

92 - 38 = 54
5 is given and 4 is missing

Solution:

After L(L-2)=L-2, Next step should be L(L-2)-L+2=0
=>L^2-3L+2=0

now solve this equation L , answer will be 1 and 2