An airplane, traveling with a constant engine speed, makes a large and perfect circle parallel to the ground. There is no ...

Each queen plotted to conquer all four islands for herself, and war would certainly have begun, if not for the timely intervention of the four queens’ wise and peacemaking daughters. The clever ...

The missing number is 1,620. The digits in the tens places (green in the figure below) of the numbers in columns 1, 2, 4 and 5 are added together. The total value is represented by the digits in the ...

IQ tests present the readers with problems in the form of picture puzzles or math problems, and the reader needs to find the solution within a time limit. These simple puzzle games make the brain ...

Brain teasers are excellent puzzle games for providing the brain with an effective mental workout. Math puzzles are a type of brain teaser that requires you to find the missing value. These types of ...

Every few months, a math problem goes viral on social media. Disappointingly often, it lacks mathematical meat. It seems over half of them boil down to the order of operations. Some tweet will get ...

In case you've faced some hurdles solving the clue, Math subj. with infinitesimals, we've got the answer for you. Crossword puzzles offer a fantastic opportunity to engage your mind, enjoy leisure ...

In honor of April Fools’ Day, I offer the puzzling case of the Lesser Fool. In a fictional town, there lived an odd wanderer. People would present him with two amounts of money or goods and ask which ...

Portal is one of the most beloved puzzle games ever made, and rightfully so. Besides the boundless, monotone charm of GLaDOS and the perky salesman talk of Cave Johnson, the gameplay is both ...