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

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

Can you find the six hidden animals in the picture below?

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

what does the below math rebus puzzle mean?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

With the help clues provided in the image, can you find the 5 digit key?