Be active and find the killer in the picture Riddle below.

Replace the question mark with the correct number in below Picture:

Which fur should we be getting from the Lion?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

What goes up but never comes down?

Why do we preferably have round manhole covers and not square ones?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

You can hear me, but you can't touch or see me.

What am I?

What is the Surname of Barbie Doll?