Spot what is wrong here in below Picture?

In the picture given below, can you find out which digit will take place of the question mark?

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Why is 6 afraid of 7?