Can you find out the number that should replace the question mark with a valid reason?

Find the Goldfish below the given Image.

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Count the number of triangles in the picture below:

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

If 21x = 79x, what is the value of x?

what does this picture(rebus) riddle means ?