This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

What English word has three consecutive double letters?

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

Can you find the mistake in the below statement?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Can you place three balls such that the equation shown in the picture holds true?

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.

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Through your logical capabilities, can you make 7 an even?