If it took eight men ten hours to build a wall, how long would it take four men to build it?
Look at the picture and find out which square is not linked with any of the other squares.
There is a box full of marbles, all but two are blue, all but two are green, and all but two are red. How many marbles are in the box?
John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do? But it is quite possible, do you know how?
Count the Triangle in the figure given below:
On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins. Can you tell me how many 20-paisa and 25-paisa he got?
In the four images below, can you find the odd one out?
You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket? (Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)
What is black when you buy it, red when you use it, and gray when you throw it away?
By what process could you make a 'Tea-Table' into food?
A network of 20 x 10 squares is given to you. Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?
The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.
