I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?
John can place six large boxes or nine small boxes into a carton.
Can you find out in how many cartons can he place sixty-six boxes in total?
The more of this there is, the less you see. What is it?
Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?
If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?
You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?
Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?
I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?
81 x 9 = 801. What must you do to make the this equation true?
Can you decipher the below rebus?
PBLUESAISNUERSES
A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?
In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki