Which number should replace the question mark?

Where do you go to learn how to make ice cream?

Can you count the number of triangles in the given figure?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

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?

Find the 8 in the below-given Image.

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

When is the top of a mountain similar to a savings account?

Can you identify the hidden rebus in the image below?

what does this picture(rebus) riddle means ?