Replace the question mark with the correct number below.

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Why is it very easy to weigh a fish?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

What is the word or phrase below?
R | E | A | D

How many triangles can you find in this given picture?

What question can you never answer yes to?

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

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