Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal? Note: 9 cannot be turned over to make it 6.
I am white when I am dirty, and black when I am clean. What am I?
First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?
Can you move 2 matchsticks to form four equal sized squares.
Every words stands for unique digit that makes the arithmetic equation true SEVEN + SEVEN + SIX = TWENTY. What are the digits ?
A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train. How did it happen?
If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?
Can you convert the number zero(0) into a positive number using just one mathematical operator ?
How many triangles are there in the picture below?
What does this rebus means ?
How can you make number one disappear by adding something to it?
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.
