What occurs twice in a week, once in a year but never in a day?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

What does this simple rebus mean?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

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