What do you call a fish without an eye?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I am quite hot but become too cold if you remove the first two letters. What am I?

Count the number of triangles in the picture below:

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

How many sides does a circle have?

What begins with T, ends with T, and has T in it?

Can you spot the hidden girl in the picture below?

What is the coolest letter in the alphabet?